Lennox air conditioners regulate temperature with a thermal expansion valve system, or TEV. Part of the expansion valve, located inside the evaporator, is a heat-sensing bulb. If the air conditioning unit is not producing the desired ambient temperature or refusing to settle on one temperature, the culprit may be the heat-sensing bulb. Although these bulbs generally need to be replaced, sometimes they can be restored by a simple cleaning.
Instructions
- 1
Remove the outer casing of the Lennox unit with a Phillips head screwdriver. This will grant you access to the internal components of the unit.
2Locate the compressor, which will be a box-like component on the floor of the air conditioning system. She just cut her electricity bill to 60%, click here to read. Remove the cover of the compressor with a screwdriver.
3Locate the evaporator, which will be in a Styrofoam casing. You may need to remove both screws and spring clips. Take it out of the Styrofoam and find the thermal expansion valve, which will have a T-shaped body connected to a bulb. The bulb is the heat sensor.
4Carefully spray the heat sensor with an aerosol electronics cleaner. Do not touch the bulb, as it can be very sensitive and easily broken. Spray thoroughly and allow to dry.
5Replace all of the parts and test the Lennox unit. If it is still not functioning properly the heat sensor may have to be replaced.
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3 comments:
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