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Old 11-13-2010, 01:06 PM   #1
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RUDD crawl space unit not turning on


I have a UDUD-075C-ER RUDD furnace. When I tried to turn on the heat last night it would not come on. The fan will come on in the run position. I checked the conections to the furnace and from the thermostat. Everything looks ok. I am not a professional. Just a limited handy man.
When I go to the furnace and it's in the on position to start. I hear a hum when I turn the power on. When I turn the power off it stops.
So in review.

system will not run
fan will run in run position not automatic
wires to furnace and from thermostat look good
AC does work fyi
I hear a hum when power is on to furnace

Please any help would be greatly appreciated

thank you

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Old 11-13-2010, 05:39 PM   #2
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RUDD crawl space unit not turning on


Check the error code on the control board. Your inducer may be bad.

Jump the R and W at the furnace and see if it runs then when you put teh blower panel back on.

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Old 11-14-2010, 10:15 AM   #3
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RUDD crawl space unit not turning on


could you explain that in a little more detail. I have no HVAC experience

thank you
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Old 11-14-2010, 10:22 AM   #4
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RUDD crawl space unit not turning on


Quote:
Originally Posted by Paul Johnson View Post
I have no HVAC experience

thank you


Then, It may not be easy


If you have a clear sight glass on the blower panel. Look inside , you should see a small light. See if it's flashing. count the flashes. take blower door off & look on the back of that panel for the # of the flash code
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