How to Remove the Friedrich Drain Pan: A Comprehensive Guide


Removing the Friedrich drain pan requires a specific set of steps, including cutting the gasket, removing the knockout at the back of the basepan, and potentially sliding out the coil and pan. This comprehensive guide provides detailed instructions and technical specifications to ensure a successful and safe drain pan removal process.

Cutting the Gasket

how to remove Friedrich drain pan

The first step in removing the Friedrich drain pan is to cut the gasket. This is a crucial step, as the gasket forms a seal between the plenum and the drain pan. Improper removal of the gasket can lead to leaks and other issues.

To cut the gasket, follow these steps:

  1. Locate the lower left corner of the plenum, where the gasket is situated.
  2. Using a sharp utility knife or scissors, make a clean cut in the gasket, starting from the lower left corner.
  3. Continue cutting the gasket, making a second cut approximately 8 inches from the left corner.
  4. Carefully peel the gasket away from the plenum, exposing the drain pan.

It’s important to use a sharp, high-quality cutting tool to ensure a clean, precise cut. Dull or serrated blades can tear the gasket, making it more difficult to remove and potentially compromising the seal.

Removing the Knockout

The next step in the process is to remove the knockout at the back of the basepan. This knockout is designed to allow for the installation of a drain line, which can be used to direct the condensate away from the unit.

To remove the knockout, follow these steps:

  1. Locate the knockout at the back of the basepan.
  2. Using a flathead screwdriver or a similar tool, carefully pry the knockout out of the basepan.
  3. Ensure that the knockout is completely removed, leaving a clean, unobstructed opening for the drain line.

Be cautious when removing the knockout, as the edges may be sharp. Wear protective gloves to avoid cuts or scratches.

Sliding Out the Coil and Pan

If you need to replace the drain pan, you may need to slide out the coil and the pan. This process can be done without opening the refrigerant circuit, provided you have enough slack in the line set.

To slide out the coil and pan, follow these steps:

  1. Disconnect the power supply to the unit.
  2. Carefully remove any screws or fasteners that are holding the coil and pan in place.
  3. Gently slide the coil and pan out of the unit, taking care not to damage any components.
  4. If you don’t have enough slack in the line set, you may need to solder or use a similar method to replace the pan.

When sliding out the coil and pan, be mindful of the refrigerant lines and any electrical connections. Avoid putting excessive strain on these components, as it can lead to leaks or other issues.

Reassembly and Reinstallation

Once you have completed the necessary steps to remove the drain pan, you can proceed with the reassembly and reinstallation process. This may involve reversing the steps outlined above, as well as ensuring that all connections are secure and the unit is properly sealed.

It’s important to follow the manufacturer’s instructions and guidelines closely to ensure a successful and safe reinstallation. Additionally, you may need to perform a leak test or other diagnostic checks to ensure the unit is functioning properly.


Removing the Friedrich drain pan requires a methodical approach and attention to detail. By following the steps outlined in this comprehensive guide, you can successfully remove the drain pan and, if necessary, replace it with a new one. Remember to always prioritize safety, use the appropriate tools and equipment, and refer to the manufacturer’s instructions for the best results.


  1. Installation Instructions – DRAIN PAN – HubSpot
  2. Friedrich wallmaster AC unitv- To drain basepan or not to drain – Home Repair Narkive
  3. Drain Pan Replacement – YouTube