Question about Ruud UBHC Air Conditioner

1 Answer

Central heat and air system won't shut off

When I turn the ac or the heater on it wont stop running and the heat pump outside dose not shut off either. I have replaced the thermostat and shut it off for about too weeks bur it still funs constantly running and if I have it on cool the coils freeze up in the unit and its starting to bug the heck out of me and I want to get it fixed so it dose not cost me in the long run can you help

Posted by on

  • mysticphoeni Nov 23, 2008

    When the sun comes up, I am going to go check out the contact relay. Just not quite adventurous to do it in the dark, by flashlight.

  • Anonymous Mar 12, 2009

    I have an Amana PGD42C0902D. Central air will continue to run indefinitely even though my thermostat is turned off. The only way for me to turn it off is by switching the circuit breaker in the electical service panel off. We had an HVAC tech come out to take a look and without turning the circuit breaker on, he just said the circuit board in the unit needed to be replaced. They are charging $300 for the part and $60 for installation. I understand the installation cost, but I'm looking for a second opinion on whether it is the circuit board that needs to be replaced or the contactor relay or if there is a short in the wiring to the thermostat. Thank you.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 25 Answers

Sounds like tstat is wired wrong or possibly the contactor relay has fused shut outside. if you can stop the system from running at the tsat it is usually a problem with the t-stat
if you cannot shut off the outside unit without turning off the power at a breaker than usually the contact relay needs replacement

Posted on Nov 22, 2008

  • cotillionsor Nov 24, 2008

    PLEASE BE CAREFUL TURN OFF TSTAT AND BREAKER TO OUTDOOR UNIT BEFORE OPENING THE PANEL THERE IS 240VOLTS IT CAN KILL. with the breaker and tstat off the pads should be seperated, if not it is fused. sometimes they can release but it will look very burnt and possibly have broken pads.

  • thethorntonh
    thethorntonh Dec 03, 2012

    My guess is the relay switch has gone bad. It's easy to replace, but you MUST shut off all power sources to all unit parts.

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Fan doesn't work in heat mode it works on all other functions. Heat does come out but fan doesn't kick in. Outside unit is operating


AC inside fan doesn't come on AUTO - DoItYourself.com Community Forums

www.doityourself.com > ... > Air Conditioning and Cooling Systems
Jul 21, 2004 - The inside FAN doesn't run when in AUTO mode. If I leave ... Is the thermostat not working correctly or something in the AC unit causing it to do this? Thanx ... The unit is electric central air-conditioning(heat and cool). It made ... Carrier A/C condenser fan not working
Jul 27, 2012
Heater Fan Doesn't Work on AUTO
Jan 23, 2006
Blower doesn't work in ON position after repair
Mar 25, 2005
Central AC/Heat, Blower Doesn't work on Auto
Nov 30, 2004
More results from www.doityourself.com

Nov 01, 2015 | Air Conditioners

1 Answer

Carrier heat pump (basic model) runs at 0 or below


A basic model heat pump with an air handler with electric strip heat generally will continue to run with a call for heat regardless of the outdoor air temperature unless there was an outdoor thermostat (an accessory) installed. There is still heat in the outdoor even at temperatures of zero and below. Generally, there is a balance point of approx 30-35degF that allows the heat pump to heat your house to 68degF without the need for the electric heaters. Below that, the heat pump can still extract heat from outside and "pump" it into your house; however, it will need help from the electric heaters. In temperatures below the balance point, the heat pump will run non-stop. As the temperature in the house falls approx 1 - 2 degF below the setpoint, the electric heaters will energize. So it is not uncommon for the system to run non-stop with the temperature falling a few degrees below setpoint. The colder the outside temperature, the more often the strip heaters will cycle on/off. If your system is well-maintained and operating at proper performance, it is still cheaper to run your heat pump than it is to run on straight electric heat. If you live in a climate where below zero temperatures are normal during the winter months, you might want to research heat pump options that offer higher COP's and increased performance in colder temperature than the basic contractor's model. Start with initiating communication with a local contractor. You will need to consider initial cost and the pay-back period based on your local energy costs and your specific demands you want your system to meet.

Hope this helps!

Feb 14, 2010 | Carrier 38CKC036 Air Conditioner

2 Answers

Carrier 38CKC042300. oUTSIDE UNIT FAN WAS TURNING REAL SLOW. ac UNIT IS OFF BUT FAN TO OUTSIDE UNIT IS STILL TURNING. sHOULD NOT BE TURNING AT ALL WITH AC UNIT OFF


The outside fan may run if the unit is in defrost mode this is normal for most heat pumps it is there way of trying to keep the outside unit from staying iced over so the next time the unit runs it will have air flow through the coil and the ice will not be there to prevent air flow.

Jan 12, 2010 | Carrier 38CKC042 Air Conditioner

2 Answers

My heat unit will not blow hot air unless we go outside and hit a button on the back bottom of the unit. Once we do that it will blow hot air for that cycle. when it is time for it to come on it is cold...


If it does not have a furnace or heating elements for heating, then it is a heat pump, which is rare for a central AC system, but makes sense of the fact that it blows warm air when you reset the pressure switch, which may indicates freon pressure charge problem if your AC system has a reverse valve and uses freon to for heating (heat Pump).

Do you get heating when outside unit runs? if you do, check freon pressure levels and top up to required pressures. The button you depress is a pressure reset switch ... that is if your AC system is a heat pump ... which, as pointed above, it is not common for central ACs.

Nov 07, 2009 | Ruud Central System Air Conditioner

1 Answer

Till what outside temp is the 8Kw heating output


Are you referring a to an electric furnace providing the heat, the heat pump providing the heat, a heat pump providing heat usually with an auxillary/emergency electric heating unit, or an air conditioner with an electric furnace attached? If your system normally uses a heat pump for the heat normally, there is an eletric auxilliary heater. You'll probably need to turn it on at the thermostat manually when the outside temp gets below 40 degrees. If you have it nice system, it might do it automatically. If you're referring to the electric heater being rated 8 kw, it'll run using 8kw when you turn it on. It doesn't have the ability to change what heat rating it is. If you're refurring to the heat pump system being rated 8kw, you're probably mistaken. A heat pump might possibly consume 8kw to run the system but that can't be a measure of the system's capacity. Heat pump measurement units are rated in tons, but the system will always run at the same ton capacity whenever it's on, provided it doesn't need any maintenance. Some commercial air conditioning and heating systems have to ability to modify their power output based on the outside temperature, but I doubt you're dealing with that kind of thing.

Sep 17, 2009 | Air Conditioners

2 Answers

Furnace runs on heat, air conditioner does not


If you have a Gas furnace in the Attic then the answer is yes. The outside condenser will not run if in fact you have a gas furnace.

Feb 11, 2009 | Ruud Central System Air Conditioner

2 Answers

No hot air


There could be a couple of problems going on. Your fuse on the heater up in the attic is popped.
Your glow ignition is broken.
Your spark ignitor is bad (if that is what you have)
GAs valve is bad.
Or the vent sensor is bad, meaning that the exhaust fumes are not going anywhere.
Now when you turn on the heater your condensiing unit outside should never turn on unless you are calling for AC. Now if the ac is not coming on there can be more problems.
Disconnect fuse is popped.
Wiring is wrong going to the heating board.
No wires for AC going to the thermostat

Feb 10, 2009 | Air Conditioners

1 Answer

My new Amana compressor Central Air-Heat Pump hums very loudly


When it hums, is it running? Or does it not run when it hums? I'm assuming it runs when you say you have to turn the therm off to get the noise off.. If it's humming and not running, you have big problemo friend..

Dec 02, 2008 | Amana PTH123B25AJ Heat Pump Air...

Not finding what you are looking for?
Ruud UBHC Air Conditioner Logo

4,483 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ruud Air Conditioners Experts

Lawrence Oravetz

Level 3 Expert

7665 Answers

Stephen

Level 2 Expert

188 Answers

MightyMikeJr

Level 3 Expert

347 Answers

Are you a Ruud Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...