Question about Ruud UBHC Air Conditioner

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Ruud ac unit, powers on and then off every few minutes

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Either tstat sensativity setting is too high or possible low pressure switch. if you have had to add freon before and never located the leak it would possibly be low on freon again. If you have replaced the tstat you may need to adjust the settings .

Posted on Nov 24, 2008


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1 Answer

Ruud will not turn on

check breakers, check 24 volt transformer, check thermostat sometime the contacts on stat will not make proper contact. take front off and clean with contact cleaner spray let dry for a few minutes before turning back on.

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I have a Ruud unit at one of my businesses. It has two 220 breakers for heat and one for ac When I turn on the all breakers and then turn the thermostat on it blows the ac breaker. The grass was just...

Sound like you have a short in one of the components. Turn off the breaker that keeps tripping. Using a Multimeter set it to ohms and go from the ground with one lead and each component with the other till you find the shorted component. Once found replace that component. Be careful to ensure that no power is present for this may result in serious injury. On the Heater/AHU it would be most likely your evaporator fan motor. On the outdoor condensing unit it would be most likely your compressor or condenser fan motor. These components electrical wiring would need to be isolated and tested to ground using the ohm meter with NO electrical power present to test for the short.

Jul 27, 2011 | Ruud UBHC Air Conditioner

1 Answer

2.5 RUUD AC not working, power must be getting to the unit.

Have them turn the outdoor unit off and wait a few minutes. When they turn it back on they should here
the fan and the compressor come on. They are to different sounds.

If they think that they have both come on, tell them to check the black insulated suction line. it should at least cold to the touch. If not it could be a freon issue.

If the line does get cold, have them checkthe filter in the house. If that is ok tell them to turn the power off
to the outside unit. Take a garden hose and wash
the outside coils on the outdoor unit,be carefull not to
smash the fins. Wash them at an angle from top to bottom.

Jul 05, 2010 | Ruud Central System Air Conditioner

1 Answer

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Turn thermostat all the way up, then turn unit off. Wait a few minutes then turn power back on. The induced draft blower should start. 20 seconds later
if you have a hot surface ignitor-it should glow.

If it does not glow then more then likely it iscracked on the back side. You will haved to remove it to see this. Be very carefull these are delicate and will break easy

Feb 08, 2010 | Ruud UBHC Air Conditioner

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The reset is two pins on the defrost board. Put a flat scredriver across them to reset the board.

Aug 15, 2009 | Ruud UBHC Air Conditioner

1 Answer

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1 Answer

Need to find ac coils for RUUD ac in the Air Handler

follow the copper lines coming into the air handler.1 will be large and insulated and the other smaller and uninsulated.They attach to your evap coil.

Aug 18, 2008 | Ruud UBHC Air Conditioner

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