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My ruud upka-036jaz keeps freezing - Ruud Heating & Cooling

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First off check your air filters and make sure the indoor fan is running. If there is not enough air flow over the coil it will cause this. If those are OK you may have a low refrigerant charge.

Posted on May 02, 2010

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Posted on Jan 02, 2017

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I have a RUUD UPKA-036jaz heatpump. Anytime the thermostat is set to heat, the reversing valve coil is energized. Even if the unit isn't running. Is that normal?


Most heat pump reversing valves energize in cooling. Does it ever "deenergize". If not its stuck, if it does check programming, may be setup to operate that way. Or possibly wired wrong or wired as straight cool. To answer your question, i dont think that is normal.

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Wiring diagram RUUD UAPA-036JAZ


the condensor gets 240 volts a-c and 24 volts a-c to control contactor. pretty straight forward on this 3 ton unit. the 240 volts comes off breaker box and the 24 volts comes off thermostat and common of transformer.

Jun 10, 2014 | Ruud Heating & Cooling

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Uamb 036jaz


The evaporator coil is probably frozen too.The fan might of failed and it caused the evaporator coil to freeze along with the suction line. Based on what you said about hearing a noisy blower motor noise. I believe the blower motor failed and caused your problem.There's only a few things that cause freezing; 1. blocked or no airflow 2. low or loss of refrigerant. You have no airflow, most likely because of a defective blower motor.

Aug 28, 2012 | Ruud UAMB Air Conditioner

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RUDD UPKA-061-JAZ Specs:


Ruud Air Conditioning Division • P.O. Box 17010
Fort Smith, AR 72917-7010 • 479-648-4900

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1 Answer

Is ruud heat pump model upka-042jaz a single or multiple stage pump?


I NEED THE MAKE AND MODEL OF THE T-STAT TO HELP YOU
DID HE CHANGE ANY WIRING?

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