Gold Star window A/C R5207Y3 Evaporator ice buildup
Have had this unit for about 5 years, recently the front of the evaporator freezes over with ice and cooling capacity is lost. Followed troubleshooting guide to reduce thermostat setting and this worked but as soon as I turn the thermostat back to cool the ice forms. Is she just tired or is there something else I can do?
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Re: Gold Star window A/C R5207Y3 Evaporator ice buildup
This is njormally an issue with oversizing but this should have manifested itself the 1st time you used it, unless you have relocated the unit. If you have reinstalled it in its original location and if you have cleaned the coils as required, then you have a low freon issue that only a professional should resolve.
Tip: If the ice is building up in 1 small area and not evenly across the complete evaporator coil, then you definitely are low on freon.
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You might have ice building up on your evaporator coil. That ice serves as an insulator and prevents the internal freezer temps from going down to design parameters. The ice buildup is caused by the defrost mechanism not working - check the timer or the defrost heating element.
replace the evaporator thermistor located on the top of this coil behind the inside freezers rear cover panel,it looks like a small 22 caliber bullet and has 2 small white wires protruding from the one end,this reads the evaporator coil temperature info and determines when to defrost the evaporator coil,a good way to test it is to open the control board in the rear of the unit unplug the upper right J1 connector and measure pin 1 and 5 for resistance of approximately 16,000 ohms when the thermistor is un-clipped off the evaporator and immersed into a glass of ice water for at least 5 minutes prior
What may be at issue is evaporator icing. Some units cycle the compressor, others control the refrigerant to keep the evaporator temp just above freezing. If allowed to continue the evaporator would freeze over and air flow would stop....
Check and see if that is the case...
Sounds like an air flow problem.......... Dirty Filter, not all of the supply vents open, return air blocked, Evaporator coils dirty, Blower motor quiting after it runs for awhile Check run capacitor.
Check to see if you are getting an even frost pattern.... if you are not , may be low of freon Thermostat set to low not letting the unit cycle off...... Are you running the AC with low ambient conditons outside..... Which will lower the head pressure which will lower the suction pressure and get the evaporator coil down under 32 degrees which will cause it to freeze up So take your pick it can be any number of problems....... Hope this helps.......
You will need to check the evaporator it may be iced up. Two things may cause this the evaporator fan motor may be bad or the condensate drain could be clogged and causing the water to freeze on the evaporator. When the evaporator gets iced the air can't pass over it and get cold.
If coils are clean, or have been cleaned recently, then check your discharge side of unit for restriction. It may require you to take down ceiling assy, to be sure that there is nothing blocking the duct work inlets, if it is a ducted system. Also if ducted system, make sure you don't have too many blocked/shut off. As well you should have a freeze probe, or round sensor in the coils at front where intake filter goes over, (evaporator) to sense the frost, and kick compressor out until it thaws. When was the last time the evaporator and condenser (rear) coils were cleaned?
First you need to make sure the filter is clean to allow good air flow through the evaporator. If the filter is clean make sure the evaporator is not plugged up with dust and lint. If all that is ok your problem is the a/c BTU's is to big for the size room you have the a/c in and it is getting the room too cold. If that happens the evaporator will ice up and will not cool the room.