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Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue.
Are you sure about the model number (UPHK)? I can't find it in the data base.
OK, hang on while I pull the specs.
You'll probably have to replace the ECM motor control module so if that's what they were referring to it is a likely fix.
Yes it is separate from the motor and can be replaced without replacing the motor. However there is a specific procedure that must be followed to replace the ECM. Could also be a stuck relay on the board as well.
You could give these guys a call for partshttp://www.bestbuyheatingandairconditioning.com/
I'm going to open this up to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.
I am Tim. a different expert.I am a Ruud dealer.
The problem is going to be one of two things. One could be the control board is not sending signal to motor and the other which is most common is a defective controller on the motor.
The tool for testing costs about 100 bucks. You can see it at link below:
If you have the tool or wish to obtain it, I will be happy to assist you in detemining if issue is with control board or motor.
If this is something you want to troubleshoot and have or can obtain the test tool,let me know.Otherwise you will need an onsite tech to troubleshoot to determine if issue is motor controller or board.
Click on the link below for more information on what I am referring to using the ecm motor tester.
The most common cause is the bell control on the end of the motor .They are known to fail on these units.
Hopefully this will be cobvered by warranty as the motor with bell is about 800 bucks wholesale.If you can give me serial number ,last name and zip code I will be glad t check on warranty status for you.
My apologies,I should have been more specific. I need serial on the UPHK_24J11NFD air handler
Thanks.Be right back
Any more numbers before the T?
Below is Ruud serial formats.
Can you make sure the numbers are all correct.This number does not come up as a valid serial
Ok.from the 09/04 it was manufactured in September of 2004.THat will be 12 years old so it will be past the 10 year warranty even if it got registered, so not under warranty.
Without the test tool you might try unplugging the low voltage plug to motor and see if it will go off.
The ECM is high voltage powered (The Black and orange wires) and low voltage controlled through the control board through (the 15 pin connector).
This means the motor has power at all times. When we call for heat or ac the controller gets signal from board.
So unplug the 15 pin connector.If fan still runs, issue is in controller if it goes off, most likely the board.Let me know.
AS a contractor, I always like to verify by using the tester mentioned above.That tester is about a hundred bucks.Since motor does not come on it is a good possibility that issue is the board.My recommendation is get the tester or to pay a tech (who will have the tester) to verify 100 per cent that it is the board.It is still a small possibilty controller on end of motor.Once we know for sure we can locate the part needed online wheter it is board or controller for about half what a tech will charge to replace.
Phil if you have found the board for 40 bucks, I would be tempted to say let's go ahead and replace it first.When ready just sign in to JA website and go to MY QUESTIONS, that will bring you back here.