Question about Ruud Central System Air Conditioner

2 Answers

Have tempstar model NFCX3600CZ Ser# L0239 58594 and unit will not switch from head mode to cool mode. Contractor says it's a bad reversing valve. cost will be $525 to fix. Question estimate.

Posted by on


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 4,654 Answers

I am a Technician myself and work for myself. Their price is fine if they don't try to add as they go. Reversing valves are delicate to install and you have the issue of recovery and disposal of the freon that was inside your unit. I am not siding with the Technicians either there are good ones and bad ones. Did this technician come out and test the unit or was this a quote on the phone? Depending on the age of your heat pump I would consider other factors. We also are nearing the end of the R-22 age and moving to better more efficient units that conserve energy. SEER rating means a lot if you add the cost of energy. The newer styles of heat pumps work under extreme pressure. The higher the seer number the lower the cost for energy. Your model may be a 10 seer I will look after I finish this post. Let me know the age of your heat pump. Remember a heat pump works all year round and not just summer months so life span is reduced. Thanks, Sea Breeze

Posted on May 16, 2010

Testimonial: "Thank you for your candid comments. My unit is 7 years old. I will look at all factors regarding the unit. The repair person works for the contractor that installed the units, one up and one down. Thanks again. ****"


  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 53 Answers

Hi yoou would probably check the least exspensive thing first which iam certain that sounds like a thermostat problem change that out first...

Posted on May 16, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

When switched to heat mode, why does it stay in cooling mode?

The coils on both reversing valves could be open. Coincidental but not impossible.

Jan 25, 2016 | Heating & Cooling

1 Answer

Amana heat pump package won't go into defrost,changed board and sensor did'nt help.old model unit,eph030001f

Try putting the unit in cooling and set thermostat to 50°F and see if the reversing valve shifts.
If it doesn't shift then you need to check the voltage to the valve in the cooling and heating mode to see if you have proper voltage,(you will only have voltage to the valve in one mode probably cooling and no volts in the other mode, either heat or cool) then check the wires to the reversing valve to see if one is loose or disconnected, if they are OK then the reversing valve is probably stuck and the only thing you can do is replace it.

Jan 09, 2010 | Heating & Cooling

1 Answer

Honeywell Wireless System THM5320R Wireless system and thermostat startup ok. The issue I am having is that; when the thermostat is in cooling mode and the unit starts the reversing valve is in the wrong...

how old is the existing system? i do ac in florida and usually if its not the wiring, an old systems rev. valve may stick. a firm tap on the valve may solve your problem.

Oct 28, 2009 | Heating & Cooling

1 Answer

Hi, I have a wall mount midea split a/c model- MSG-36HR that will only heat. when put in cool mode it only blow's room temp air and the outdoor unit won't run. On heat mode it works normally. I have cycled...

Most heat pumps are 'fail-safe to heat'. That is: the normal position of the valve which reverses the function is in the position which provides heat. The reversing valve must be powered to switch to the cooling position.

Although the lack of valve function could be a mechanically defective reversing valve - it's more likely to be an electrical issue. Start with checking for power at the reversing valve's coil. If it's powered unpower it - you will be able to hear the reversing valve distinctively

Oct 03, 2009 | Midea Heating & Cooling

2 Answers

Programmable T stat

your trane heat pump energizes the reversing valve with O - orange y - is to turn on the unit make sure you have your orange wire hooked up and the tstat programming set to heatpump otherwise your reversing valve might be bad

Jun 30, 2009 | Honeywell Electronic Programmable...

1 Answer

A/c cooling fine but not heating

The fan generally does not come on until the unit has achieved some high head pressure so that it can produce hot air. If it is low on gas it will not get to this stage.

Jun 26, 2009 | Heating & Cooling

3 Answers


I sell Rudd equipment. You have air in the system or faulty TXV. Replace TXV and evauate system. No more problem. Rusty

May 27, 2009 | Heating & Cooling

1 Answer

Reversing valve not switching over to air on heat pump. compressor will come on for about 10 minutes, then shut off. Hot air comes out vent.

Look for any refrigerant leaks - no or low refrigerant can cause problems in both modes. The unit may be going off on low suction.


The unit may be stuck in the heating mode.

Make sure the system is calling for the correct mode (cooling or heating) - some systems are auto, but if you can, select cooling since that is the requested mode. Check for power at the reversing valve inside the condensing unit. If power exists, then the reversing valve is stuck. It could also be the reversing valve solenoid coil, so make sure that isn't bad. There should be a strong magnetic field at the solenoid coil.

If you can hear the reversing valve clicking (moving), check the T-stat and make sure it will switch modes. Also check the reversing valve relay (those can be located in either the indoor unit or condensing unit).

May 25, 2009 | Ruud Matching Split Air Conditioner

1 Answer


Orange or O terminal on Tstat energizes valve in colling cycle. Go to outside unit jumper red to orange and see if Reversing valve energizes. If it does . Problem inside possible Tstat. You shoulf here the valve click. Have someone inside switch from off to cool you should here valve. Rusty

Apr 27, 2009 | Heating & Cooling

1 Answer

System does not go into defrost

Did you check the solenoid on the reversing valve? Has the compressor ever been replaced?

Most reversing valves are normally in heat pump mode, and when the solenoid is energized, it is in A/C mode (in summer cooling, the valve is energized.). If the solenoid is bad, then the unit can not switch to defrost.
If the compressor has been replaced, there is a chance that the reversing valve might have some trash in it, preventing it from switching over. Lightly tap on the valve when defrost or A/C mode is being asked for.

Jan 22, 2009 | Intertherm P3RA-048K Air Conditioner

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

322 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ruud Heating & Cooling Experts

Donni Steen

Level 3 Expert

659 Answers

Bill Long

Level 3 Expert

587 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Ruud Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides