How to Light a Thermoheat Propane Heater: A Comprehensive Guide

Lighting a Thermoheat propane heater can be a straightforward process, but it’s essential to follow the proper safety protocols to ensure a safe and efficient operation. This comprehensive guide will walk you through the step-by-step process of lighting your Thermoheat propane heater, providing you with the technical details and DIY instructions to get your heating system up and running.

Preparing the Thermoheat Propane Heater

  1. Inspect the Heater: Before attempting to light the Thermoheat propane heater, thoroughly inspect the unit for any signs of damage or wear. Check for any external or internal damage that may have occurred during shipping or storage. If you notice any issues, contact the dealer or distributor where you purchased the heater for further assistance.

  2. Connect the Hose Tightly: Use a wrench to securely connect the hose to the heater. Ensure a tight, leak-proof connection to prevent any gas leaks.

  3. Install the Propane Tank: Attach the compatible propane/LP gas supply cylinder to the connection device provided with the hose and regulator. Always keep the tank/cylinder securely fastened in an upright position to avoid any potential damage to the regulator’s diaphragm.

  4. Leak Checking: Perform a thorough leak check by applying a leak detection solution or soapy water to all connections. Observe for any bubbles, which would indicate a gas leak. If a leak is detected, turn off the gas supply and tighten the connections before attempting to light the heater.

Lighting the Thermoheat Propane Heater

how to light thermoheat propane heater

  1. Test Firing: Turn the gas valve knob clockwise to the OFF position. Open the valve and turn the regulator knob to the medium setting. If the propane heater is heavy, use a hand-truck, a trolley, or a wheelbarrow to move it safely. If the regulator needs to be replaced, purchase a new one from your local heating supply store.

  2. Removing the Valve Cap: Carefully remove the valve cap. If you encounter difficulty, put on a glove to provide more grip and leverage without damaging your hand.

  3. Igniting the Heater: Hold a match or long lighter about 1 inch (2.5 cm) away from the mesh screen, and push in the safety shut-off valve plunger. This action will allow the gas to flow and ignite the burner. If everything is set up correctly, the heater should light. However, you’ll need to hold down the plunger for a bit longer to ensure the heater stays lit.

  4. Adjusting the Heat Setting: Once the heater is lit, you can turn the knob to the desired heat setting to achieve your preferred temperature.

Shutting Off the Thermoheat Propane Heater

  1. Cooling Down Period: After you shut off the heater, it will remain very hot for approximately 7 to 8 minutes. Allow the heater to cool down completely before attempting to move or handle it.

  2. Checking for Residual Heat: After the 15 to 20 minutes have passed, test the heat by placing your hands around the head of the propane heater. Do not touch the heater directly, but rather hold your hands near it to feel if any residual heat is still present.

Technical Specifications

The Thermoheat RMC-FA60/L Propane Construction Heater has the following technical specifications:

  • Maximum BTU Rating: 60,000 BTU/HR
  • Propane Gas Supply Pressure: Minimum 11 inches of water column (iwc), Maximum 20 ips
  • Safety Features: Manual shut-off
  • Clearance from Combustible Materials: Minimum 24 inches in all directions
  • Ventilation Requirements: Well-ventilated area

DIY Instructions

To light a Thermoheat propane heater, you’ll need the following tools and materials:

  • Thermoheat propane heater
  • Propane tank
  • Gloves
  • Hand truck (if the heater is heavy)
  • Lighter or matches

Follow the step-by-step instructions outlined in this guide to light your Thermoheat propane heater safely and efficiently.


  1. Thermoheat RMC-FA60/L User’s Manual And Operating Instructions
  2. How to Light a Propane Heater: 15 Steps (with Pictures) – wikiHow
  3. How to light your Thermoheat propane heater – YouTube
  4. Thermoheat Radiant Propane Heater – Tool Skool
  5. Proper Operation of Your Tank Top Heater – YouTube