Question about Comfort-Aire HMC18AD-1 Air Conditioner
The L3 and L4 lights are blinking means that the filter is dirty and obstructed. You’ll need to clean the filter. Also Inspect whether the evaporator air is blocked, remove the blockage. Check the air intake and outlet ducts of the condenser side are obstructed. Check both of the ducts. Check whether the unit is set on dehumidifying mode. Set at cooling mode, Set at low fan speed Re-set the fan speed at high speed and check.
However, if this doesn't help then it might have happened that the compressor is not runing and the connection to the compressor is cut. Please check the wiring diagram on Pg 22 in this manual---
Comfort-Aire Air Conditioner Manual & wiring diagram
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Posted on Aug 02, 2010
The model you are referring to is made by Heat Controllers Inc. I cannot find the model that you have on their website. The closest I get is MMC18DA-1.
Is this your model. Refer the manual available from Comfort-Aire website. If you have the unit made by Energy Knight then the model number you have HMC18AD-1 is correct.
Posted on Aug 05, 2010
You can download the manual at the website below
i bought a replacement t-stat, that did the trick. the idea i of taking out the t-stat temp coil and moving it out from the condenser coil seems like a worthy enough idea, although my replacement t-stat only cost me 30 bucks and a half hour..
You should make sure your compressor coil is very clean, by blowing it out with air and vacuuming it out. Making sure there is no ice built up anywhere on your coils, and making sure your door seal is air tight.
Posted on Aug 03, 2010
Please check the bellow link for the manual....
Let us know if you have something more to know else accept the suggestion.
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Posted on Aug 03, 2010
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Posted on Jan 02, 2017
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