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Goodman hvac unit not working no power
goodman hvac unit not working no power. touchscreen thermostat not reacting to touch unless pressed very hard. swapped thermostat faceplate with downstairs unit and it works fine. No power for a/c or furnace. Fusebox shows all power is on and emergency switch is on. What could be problem?
Comments:
May 26, 2009
- GMS9 unit 3amp fuse blew but after replacing fuse on board with a 5amp still does not work properly. At first a/c unit began working (light came on) so I put door back on then stopped working again. Gave a quick flash of light and went out. Fuse looks fine? Is this a contact problem? Unit only 3 yrs old, no apparent wiring issuesMay 29, 2009
- Sorry to confuse but my post meant to say that t-stat faceplate was tried on lower level hvac and worked fine but won't work on problem unit upstairs. Neither faceplate seems to fix prob on upstairs unit. Seems that when 3amp fuse blows the t-stat touch screen does not react unless pushed forcefully. Called t-stat company and they suggested disconnecting 'blue' wire from t-stat (it is optional anyway) but no change. I think fuse has blown again on c-board. Does this sound like problem with system board?May 29, 2009
- HVAC guy just left, had a bad transformer that needs to be replaced. The old one looks brand new but he tested it and even swapped it with the one downstairs to confirm it was bad. I jus hope that there was nothing else between the t-stat and circuit board that blew the tranny.I'm still open to comments on this thread
Clarification Request
Posted by jumptrout51 on May 17, 2009
By your own troubleshooting it seems you have a bad thermostat.
Solution #1
posted on May 17, 2009
is it oil if so firomatic above the furnace in the 4x4 box could be bad that is a safety
Comments:
May 26, 2009
- I am sorry i sent the wrong answer to you i was answering another question dont know how i ended up on you request appreciate if you could respond back with inapprpiate thank youYes
No
Solution #2
posted on May 17, 2009
is your breaker a double pole or single pole breaker to the indoor unit
?
?
Yes
No
Solution #3
posted on May 26, 2009
As I said, bad t-stat.
When you switched covers it worked correctly. The t-stat sends a signal through the fuse then to the components you are calling for.
The original t-stat blew the fuse and is hard to push.
Replace your t-stat and solve your problem.
Replace one wire at time until the fuse blows. That will be your bad component.
When you switched covers it worked correctly. The t-stat sends a signal through the fuse then to the components you are calling for.
The original t-stat blew the fuse and is hard to push.
Replace your t-stat and solve your problem.
Comments:
May 29, 2009
- Remove the output wires on the control board. Turn the system on.Replace one wire at time until the fuse blows. That will be your bad component.
Yes
No
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