Question about Comfort-Aire PAC-121 Air Conditioner

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Comfort Aire PAC-121 problem

I have a Comfort-Aire PAC-121 air conditioner. The unit turns on, but when set to cool, E4 shows up on the display, and the fan shuts off. Can you help me with the solution to this problem? Thanks for your time----------Ned

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E4 shows up on the screen on my PAC-121 when the water reservoir on the right-hand-side is not pushed in all the way. If it is in all the way the switch that it engages may be bad or out of place.

Posted on Mar 23, 2009

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