Originally Posted by kyman
We have a 3 week old 8528ikws parked in Ky. The A/C runs for hours with out a cycle. Dealer says it is working like it should. Anyone else having this kind of problem? Dealer says he upgraded to a 15000 btu unit. My first post did not have much info.
To get the unit to cycle, I set my thermostat to 10 degrees below outside air temperature. The unit needs to cycle in order to dehumidify and not ice up.
I have to add that 90 is the max setting we used even in temps above 100.
Setting the thermostat too low will cause frost to build up on the fins and the ice detector will shut down the compressor. This happens a lot with 15K BTU air conditioners like our Coleman Mach III. (Yes, the fan continues to run in this scenario. After the ice melts, the compressor will start up automatically, but the ice will form again repeating the cycle.)
Another cause of cycling problems is leakage of cold air into the intake plenum. If the barrier between the intake plenum and the forced air exit duct is not sealed properly, the colder air going into the intake plenum may "trick" the frost sensor into thinking the cooling fins are frosted when they are not. Again, this will shut the compressor off, yet leave the fan running.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW