Question about Ruud UBHC Air Conditioner
My heat pump will not come on in HEAT or A/C. I thought I might have a simple defrost control board problem, but still no go after replacing the board and the defrost relay. I checked the pressure switch and it is not tripped. I've checked all the circuit breakers and they, too, are all set. I've checked the outside unit using the "test" switch inside on the start relay and the unit will come on, but won't stay running on it's own. When I select HEAT, I wait the necessary five minutes for the unit to switch and it keeps switching to AUX HEAT. In A/C the unit does nothing. Can someone provide me with some guidance, here?
Start with the simplest first it,s not fun but it's necessary EVERY TIME. Clean your evaporator and condenser coil, change your air filter. Getting to the evap. coil is often a real headache and a result doesn't get done often. When its clogged as you probably know the refrigerant can't absorb heat at the coil so it tries to absorb heat on the way to the compressor freezing the hot gas line the safety circuits that protect the heat pump compressor from getting liquid refrigerant back to the compressor almost immediately will take the compressor of line (looking somewhat like a defrost cycle). I hope this helps it's a tough repair GL!
Posted on Jun 08, 2008
I can't find the re-set button on my Ruud heat pumps.
Posted on Jan 11, 2010
Ruud achiever heat pump brand new system perfect charge everything wired correct but for some reason the back up heat is turning on while there is a call for cooling.
Posted on Jun 15, 2008
Was this a new startup, or was it working and it became a problem? IF new sounds like a control wiring problem, check t.stat wiring and confirm with electrical prints
Posted on Apr 23, 2007
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Posted on Jan 02, 2017
SOURCE: RUUD Central Air/Heat Pump
if it runs with the test button it's not getting a call from the stat.
check for 24 v. from common (brown) to yellow. that should give you cooling add 24 v. from common to 'B' ( blue) for heat
Posted on Oct 25, 2009
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