Question about Ruud UAKA030 Air Conditioner

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The heat relay is closing on call for heat but opening quicly

The unit is new and the heat has never run before. It is a heat pump with 5kw heat strip.

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  • tomholman70 Feb 04, 2009

    House temp is 65, it warmed up after the heat pump ran so that part is working correctly, thermostat set at 74, Heat pump is operational, 2nd stage heat (5kw heat strips) relay comes on for 1 second, then off for approx 10 seconds. The relay is fed through a board mounted on the fan blade housing. The relay states it is 24vac input/24vdc output. Unit is 240vac 1ph 60.

  • Ken Bledsoe May 11, 2010

    The thermostat has a selection switch cool off heat emg heat where is your switch set at?

  • Ken Bledsoe May 11, 2010

    What is your thermostat set at is it heat or emergency heat?

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Ok rheem and ruud is the only co that the hp is set to the b term on the stat for heat. is the stat wired corectly? is it a hp stat? and on a 2 1/2 ton hp you should have more than 5 kw. what kind of stat? the relay is correct because you have transformer that takes 208/230 down to 24 va. let me know.

Posted on Feb 04, 2009

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