Does a 2 Stage Furnace Need a Special Thermostat? Quick Tips

A dual-stage furnace has two levels of heating output: the first stage and the second stage.

A single-stage thermostat can only control the first stage, lacking the ability to activate the second-stage burners when necessary. A 2-stage thermostat supports both stages of the furnace, enabling more efficient operation. It determines whether to utilize the first or second-stage burners based on the desired temperature setting.

Does a 2 Stage Furnace Need a Special Thermostat

In addition to managing the heating stages, a 2-stage thermostat also controls the blower speed of the furnace.

The 2-stage thermostat includes a feature that locks out the electric backup heat, ensuring optimal performance and preventing unnecessary energy usage.

It’s important to check compatibility between your furnace and thermostat, as all thermostats don’t work with every furnace model. Consult an expert or the manufacturer’s rep to make sure you get the right one.

2-stage thermostats also offer more precise temperature control than single-stage ones. They use algorithms to independently operate fan speeds and adapt their cycle times based on external temperatures. 2-stage furnaces are a shining example of efficient heating!

Understanding Stage Furnaces

To understand stage furnaces with single-stage furnaces and dual-stage furnaces, you need to know how they work and what their benefits are. Single-stage furnaces are simpler and have only one option for heat output, while dual-stage furnaces offer two options for heat output, providing more efficient operation. In this article, we’ll explore the advantages of these furnaces, what makes them different, and which one might be best for your house.

Single Stage Furnaces

  • Single Stage Furnaces may not be the best choice for extremely cold climates.
  • However, they are still a great and energy-efficient option for moderate weather conditions.
  • When deciding on a furnace, consider factors such as efficiency rating, size, and fuel source.
  • It is recommended to consult with an HVAC professional before committing to a specific furnace model.

Don’t miss out on a better furnace! Book a consultation with an expert technician now. They’ll help you get optimal performance during winter. Upgrade your furnace and experience the advantages of Dual Stage Furnaces. ‘Just right’ is overrated, have hot and hotter air!

Dual Stage Furnaces

Dual Stage Furnaces are advanced systems that burn fuel over two stages, providing higher energy efficiency and cost savings for homeowners. These furnaces have a two-stage gas valve and variable-speed blower motor to give precise temperature control. 

Advantages include better energy efficiency, increased comfort due to precise temperature control, and lower energy bills

Disadvantages are higher upfront cost than single-stage furnaces, possible complex installation and maintenance, and needing the correct size furnace for optimum performance. Unlike single-stage furnaces, dual-stage furnaces run at low speed during mild weather. This quieter operation and lower power consumption help spread warm air throughout the house.

To get the best performance from a dual-stage furnace, it is recommended to get an annual tune-up from an HVAC specialist. Additionally, the ductwork needs to be well insulated for consistent heat distribution and no temperature fluctuations when the furnace switches between its two stages. 

Following these steps ensures efficient and cost-effective use of the dual-stage furnace, and you can use the saved money to buy therapy for puzzled guests wondering why your house is so comfortable!

Advantages of Using a Stage Furnace

With a stage furnace, your house can benefit from a more efficient operation, resulting in a significant reduction in energy costs. In this section, we’ll explore the advantages of using a dual-stage furnace.

Efficient Operation Benefit 

A stage furnace can provide many benefits:

  1. Stops energy wastage by ensuring efficient use.
  2. Adjusts to temperature changes outside, resulting in higher efficiency.
  3. Maintains stable temperatures in the home and prevents abrupt power increases.
  4. Reduces heating costs while still providing comfort.
  • By raising your thermostat settings by 2-3 degrees, you can decrease your purchase rate by 10-20%.

Pro Tip: Get even more efficiency from your furnace with programmable thermostats! This way, you can operate it even when you’re not at home, and avoid unnecessary heating or cooling. Who needs a blanket when you can enjoy the warmth of a stage furnace? Get toasty and upgrade the comfort level of your home with this heating force!

Comfort Level Benefit 

  • A stage furnace is an excellent choice for achieving consistent comfort in your home or office.
  • It distributes warm air evenly and operates quietly, providing a comfortable environment.
  • Installing a stage furnace can reduce temperature fluctuations, eliminating uncomfortable changes in temperature.
  • Some stage furnaces come equipped with smart thermostat technology, which learns your heating habits and automatically adjusts settings for optimal temperature control.
  • Stage furnaces often offer additional features such as zoning capabilities and humidity control options.
  • Many people are opting for stage furnaces due to their advanced features and ability to provide customized heating solutions.

I discovered this when I visited my friend’s house during winter. They had just installed one and the warm air made me want one too! Not only that but using a stage furnace also saves you money on energy bills.

Energy Benefits 

Stage furnaces are great for energy savings. Their advanced technology and ability to use waste heat make them more efficient than traditional furnaces. This can be very beneficial for industrial operations where energy costs are high.

How do they work? Stage furnaces preheat the combustion air before firing the fuel. This maximizes fuel usage and minimizes waste heat. Plus, they recycle the waste heat generated by the combustion process. This design ensures optimal efficiency and lower operational costs.

Environmentally-friendly too! Using a stage furnace reduces energy consumption, optimizing fuel usage. This means fewer emissions into the atmosphere compared to traditional furnaces. Companies can lower their carbon footprint while still maintaining high productivity.

It’s time to get on board with stage furnaces! They can save money, energy, and the environment. Experience these unmatched benefits today!

Role of Thermostats in Stage Furnaces

To ensure efficient operation and comfort level in your dual-stage furnace, you need to understand the role of the thermostat in controlling the stage burners. This section discusses the importance of using the right thermostat to control your stage furnace. 

Single-Stage Thermostat

A single-stage thermostat is the way to go for controlling your home temperature. It works on a binary principle – either on or off – and is ideal for one-speed heating and cooling systems.

Single-stage thermostats work with heat-only, cool-only, and heat/cool combo systems. The thermostat turns off when the temperature setting is reached. But the heater or AC stays on until regulating comes into effect.

This technology can provide comfort in your home. Plus, you can save up to 10% annually on energy bills with a programmable or smart thermostat, according to’s 2021 report!

Stage Thermostats

Stage thermostats are a must for controlling heating & cooling systems in stage furnaces. Let’s explore some facts about them:

  • Number of Stages: Single or Dual.
  • Types of Fuel: Natural Gas, Propane, or Oil.
  • Compatibility with Furnace: Single-stage – any furnace; dual-stage – furnaces with dual-stage heat exchanger.
  • Installation Required: By a licensed HVAC technician.
  • Two-stage thermostat for dual-stage furnaces.
  • Single-stage thermostat for single-stage furnaces.

Wow! Did you know that in the U.S., home heating accounts for 42% of all energy consumption? That’s why it’s vital to get the wiring for your thermostat right – otherwise, it’ll be as useful as a houseplant in a furnace!

Wiring and Installation of Thermostat

To ensure the efficient operation of your dual-stage furnace with the right control and comfort level for your home, wiring, and installation of the thermostat are critical. In this section, we will guide you through the wiring and installation of the thermostat, with sub-sections on wiring for gas furnaces and wiring for electric furnaces. By following our guidelines, you can easily install and set the thermostat, or seek help from a service technician, without compromising on the benefits of a two-stage furnace.

Wiring for Gas Furnaces

The following is a table with information about Wiring for Gas Furnaces:

ThermostatRegulates temperature settingConnect R & W terminals with low voltage cable
Gas ValveControls gas flowConnect two wires to TH & TH/TP terminals
IgniterProduces spark that ignites gasConnect its supply wire to MV/PP terminal
Blower MotorDistributes warm air through ductworkConnect motor’s leads to L1 & L2 of control box

Plus, some thermostats might need extra wiring for features like fan control or programmable settings. Always check the manufacturer’s instructions and consult a qualified technician if uncertain. 

Fun fact: the roots of gas furnaces go back to ancient Rome. There, passive flue systems were used to warm public baths and homes. Nowadays, modern technology and sophisticated wiring methods have achieved exact temp control and efficient energy usage. So warm up with this wiring guide for electric furnaces!

Wiring for Electric Furnaces

Electric furnaces is a popular way to heat up households. To get the thermostat installed properly, wiring is a must. Here’s how to do it:

  1. Before starting, switch off the circuit breaker to cut the power supply.
  2. Recognize the wires by their colors – red, white, and green. Red is for the power supply, white is for heating control, and green is for fan control.
  3. Connect the red wire to the R terminal, the white wire to the W terminal, and the green wire to the G terminal of the thermostat.
  4. With a wire cutter, cut off a bit of length from each wire before connecting.
  5. Secure the connections with screws or locking mechanisms according to the thermostat manufacturer’s instructions.

Safety measures are important, like turning off the power source, making sure no wires are exposed, and ensuring all connections are secure.

Remember, different thermostats may have different wiring patterns. Follow your product manual for wiring instructions that fit your electric furnace model.

By using these tips and taking the right safety precautions, you can install a thermostat in your electric furnace system with ease and no issue. Now, it’s time to put on a show with your furnace and thermostat setup!

Setting Up Thermostats for Stage Furnaces

To ensure the efficient operation of your dual-stage furnace with the right thermostat, setting up a thermostat for stage furnaces with the right control is important. Setting the set point, blower speed, and preset time period for stage operation are the three vital solutions you need to focus on. In the following sub-sections, I will explain each one briefly.

Setting the Set Point 

  • Turn off the power supply of your furnace before making adjustments.
  • Find the thermostat settings on the control panel and select ‘Heat’ with the ‘Mode’ button.
  • Use the arrows to set the temperature between 68°F to 72°F.
  • Select the fan speed – either low or high – that suits your preferences.
  • Save or ‘Hold’ the configured settings, then switch the power source back on.
  • It is essential to avoid making frequent changes to the thermostat settings as it can lead to increased power consumption and less efficient performance.
  • Instead, it is recommended to program the thermostat once per season for optimal comfort.

Don’t let a lack of knowledge hinder the correct setup of your furnace. First and foremost, master the thermostat’s set points – this can cause discomfort in extreme weather conditions if not done correctly. 

Remember, inefficient functioning leads to increased energy usage and higher electricity bills. Stay ahead of any potential breakdowns and avoid the extra cost by setting your thermostats today!

Adjusting the blower speed is like finding the perfect balance between a gentle breeze and a raging storm in your home.

Setting Blower Speed

Blower speed is a must for a successful thermostat setup. So, to ensure your home’s climate and comfort, you got to set the speed right. Here’s how:

  1. Spot the blower compartment panel and pop it out.
  2. Identify the wires controlling the motor speed.
  3. For single-stage furnaces, connect the black wire to the high, red to the median, and blue to the low.
  4. For two-stage furnaces, connect black to high cool/high heat, red to low cool/med heat, and blue to low cool/low heat.
  5. Switch on your furnace. Adjust the thermostat till you hear the blower start up. Tweak if needed.
  6. Finally, fit back the blower compartment panel firmly.

ECM (Electronically Commutated Motor) furnaces don’t need manual inputs for their settings. So, if you’re uncertain about these steps, call in a pro.

A reminder: Always double-check before operating the furnace or making changes to the HVAC system. My buddy once switched on her furnace without verifying her wiring connections. Sparks flew! We were lucky to have escaped unscathed.

Setting Preset Time Period 

Setting up a thermostat for stage furnaces needs careful consideration of preset time periods. These are key to energy efficiency and reducing wear and tear on the furnace. Have an understanding of the best preset times for each stage.

A table of recommended preset times is below:

StagePreset Time Period
First10 minutes
Second15 minutes
Third20 minutes

The times may change depending on factors like outside temperature, insulation, and furnace size. Talk to a professional HVAC technician for advice on the right times.

Plus, regularly clean or replace air filters and arrange for maintenance checkups for optimal furnace performance. Did you know that according to Energy Star, well-looked-after heating systems can save 10% on annual heating costs? 

Don’t think the thermostat is to blame – sometimes it’s just a poor connection.

Troubleshooting Thermostat Issues

To troubleshoot thermostat issues with your furnace, including those with special settings for dual or two-stage furnaces, you need to understand the thermostat calls and control board logic. The sub-sections include solutions for common problems – the furnace not starting despite the thermostat calling for heat, the furnace running continuously, and the furnace shifting between the first and the second stage randomly.

The Thermostat Calls For Heat But The Furnace Will Not Start

  • When your thermostat requests heat and the furnace does not start, it could be due to various issues.
  • Check if your thermostat is set correctly and has new batteries.
  • Small issues like a dirty filter can also prevent the furnace from starting.
  • Larger problems like a damaged furnace part may be causing the issue.
  • If the thermostat and basic troubleshooting steps don’t resolve the problem, it’s recommended to contact a professional technician for further assistance.
  • Ensure your furnace is ready for winter by checking for any dirt or debris around the unit.
  • Blocked air filters or ducts can cause low airflow and impact the furnace’s functionality.
  • Consulting with an expert technician is the best course of action to inspect and diagnose any issues with your furnace.

Annually, inspect your system with a professional HVAC technician. Doing this on time and regularly is crucial. If you’re uncertain about repairs and maintenance, get help from experienced heating and cooling system pros for safe and effective performance in cold weather. When your furnace becomes a marathon runner, it’s not a good sign for your utility bill.

The Furnace Starts But Does Not Stop Running

Causes of a furnace that won’t stop running:

  1. Faulty thermostat
  2. Dirt in the air filter or fan blades
  3. Malfunctioning limit switch

Steps to fix the issue:

  1. Check thermostat settings: Ensure it is set to ‘automatic’ instead of ‘continuous’ and adjust the temperature to a comfortable level. Replace batteries if necessary.
  2. Inspect and clean/replace the air filter if it is dirty.
  3. Check the fan blades for dust or debris that could hinder rotation.
  4. Examine the limit switch below the plenum chamber and adjust it if needed. It may be the cause of the continuous operation.

Pro Tip: Get a professional technician to give your furnace a regular maintenance check-up and cleaning to keep it running optimally during the winter season.

The Furnace Jumps Between First and Second Stage

  • A furnace jumping between stages can be caused by a few things:
    1. Gas meter of the wrong size.
    2. Blocked air filter or ductwork, impeding airflow.
    3. The thermostat may need replacing.
  • Ensure that the settings are appropriate and check the wiring connections.
  • A furnace technician can inspect and adjust any pressure switches if needed.

Pro Tip: Maintenance of your HVAC can help reduce repair costs and lengthen its lifespan. Consider an annual professional inspection for your furnace and AC. Get ready to meet the stars of heating – the thermostat models for stage furnaces!

Commonly Used Thermostat Models for Stage Furnaces

To find the best thermostat for your dual-stage furnace, it is important to know the common models that are available. There are many options on the market, each with its own benefits and drawbacks. In this section, we will be discussing three commonly used thermostat models for stage furnaces: the Honeywell TH5220D1003, the Honeywell T6 Pro, and the Nest Learning Thermostat. These models all offer unique features that can improve the comfort level and efficiency of your home.

Honeywell TH5220D1003 Thermostat Model

The Honeywell TH5220D1003 is a reliable thermostat for stage furnaces. It’s designed to control the heat and cool in an efficient way. Here’s what it offers:

  • Control Type: Digital
  • Programmable: Yes
  • Display Screen: Backlit LCD
  • Heat Stages: 2
  • Cool Stages: 2
  • Power: Battery

Its cool feature? It automatically switches between heating and cooling modes to reach your desired temperature. No manual adjustments are needed!

Remember: Read the instructions before installing the Honeywell TH5220D1003 or any other thermostat. That way you’ll ensure it’s installed and operating correctly.

And pro tip: Wish my ex had been able to switch moods as easily as this thermostat adjusts the temperature!

Honeywell T6 ProThermostat Model

  • The Honeywell T6 Pro is a reliable and efficient thermostat that stages the furnace for optimal performance.
  • It features a large display screen for clear temperature viewing, and programming is easy to use.
  • The unique ability of this model is its learning capability, where it adjusts to your heating and cooling preferences to save energy.
  • The Honeywell T6 Pro has a sleek and user-friendly design.
  • By upgrading to the Honeywell T6 Pro, you can enjoy precise temperature control, increased energy efficiency, and a furnace operating at peak performance.
  • Consider getting the Honeywell T6 Pro today to upgrade your outdated thermostat and allow your furnace to become smarter with the Nest Learning Thermostat.

Nest Learning Thermostat Model

  • The Nest Learning Thermostat is a smart device designed for use with stage furnaces.
  • It utilizes machine learning to understand and adapt to your temperature preferences over time.
  • The thermostat can be controlled remotely through a dedicated app, allowing for convenient temperature adjustments from anywhere.
  • It provides energy reports and suggestions to help you save on utility bills by optimizing heating and cooling usage.
  • The Nest Learning Thermostat seamlessly integrates with other smart home devices, allowing for comprehensive home automation.
  • With its sleek design and intuitive interface, it is a popular choice for HVAC control, combining functionality and aesthetics.

So, if you want to optimize energy savings and upgrade your home comfort, invest in a Nest Learning Thermostat. Don’t miss out on the benefits – upgrade today! Trying to find the right thermostat without it is like searching for a needle in a haystack…while wearing mittens!

Choosing the Right Thermostat for Your Stage Furnace

To choose the perfect thermostat for your two-stage furnace with the proper control and efficiency settings, considering the capacity and max BTU output is necessary. Another factor to take into consideration is the control board and logic algorithm used in the thermostat. Also, the presence of features such as a timer and LED lights can enhance your experience. These are the important aspects we would cover in this section.

Checking Capacity and Max BTU Output 

Secure optimal furnace performance by selecting a thermostat that works with your heating capacity and max BTU output. This avoids losses from miscalculations. Consider your home’s age and size before buying a thermostat. It’s smarter to be safe than sorry.

Fun Fact: Wrong use of thermostats causes $180 in energy wastage each year (Source: Direct Energy). Rely on a control board and logic algorithm to regulate your furnace instead of a therapist!

Checking Control Board and Logic Algorithm 

The control board acts as the central processing unit for your furnace thermostat.

  • It is responsible for controlling various sensors, switches, and relays in your HVAC system.
  • The control board utilizes a logic algorithm to determine the duration of furnace operation based on its current stage(s).
  • It is important to ensure compatibility between your thermostat and HVAC system, as different brands may have different control boards and logic algorithms.
  • The control board and its associated logic algorithm greatly influence the performance of your furnace and thermostat.

Did you know that Honeywell thermostats use microelectronic technology to give exact control of your heating system? #romanticattheperfecttemparature #modernromance. Plus, they have LED lights? Amazing!

Checking Timer and LED Light 

Timers: Set up a routine for your heating system, especially useful when you’re away or during sleeping hours.

  • LED lights: Provide visual cues to explain the mode of your heating system, using colors to indicate if it’s on, off, or if the temperature is being changed.
  • Remote control options: Advanced thermostats with timers and LED lights often offer remote control capabilities through a mobile app or voice commands.
  • Built-in sensors: Some advanced thermostats may have built-in sensors that detect motion or occupancy in a room, allowing temperature adjustments based on the activity in that area.

Check product descriptions before buying. Timers and LED lights are great for modern thermostats – they improve usability and user experience. Upgrade your thermostat now! Don’t miss out on these advanced control options for your heating system!


For homeowners with a two-stage furnace, it’s key to have the right thermostat. A single-stage thermostat is OK for a single-stage furnace, but not for a dual-stage furnace. Using the wrong type can harm the performance of the heating system. A two-stage furnace has two levels of heat output. This means a two-stage thermostat is essential to use at all stages. The first stage is usually 60%-70% capacity. The second stage allows the system to reach the maximum BTU/h rating when extra heat is needed.