Lost control to heat and air....

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  #1  
Old 12-30-00, 05:38 PM
mikejmerritt
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Hello, My brother called from Texas with a problem he created and due to the weather can't get a service call. What he did is this. In moving the thermostat over a foot he found the need to add wire. He cut and spliced in the correct type of wire, I think, and hooked it back up. He now has no control from this thermostat. He has rewired and checked for correct connections and says all is as it should be given he spliced the wire. All breakers inside and out are as they should be. Manual says split service heat pump. There is a unit for the upstairs with separate control and it is working fine. These thermostats are the basic non digital type with a mercury switch. Could something have happened in the cutting and splicing that could cause these problems. It is going into the teens early next week and thought we could help him. Thank you for any input....Mike
 
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  #2  
Old 12-30-00, 07:11 PM
fjrachel
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If he did not turn off the electric to the air handler, he probably blew a fuse to the control transformer or the transformer itself.
 
  #3  
Old 12-31-00, 07:58 AM
mikejmerritt
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fjrachel, Thanks for the fast reply! Is the fuse a DIY project and if so where would the control transformer and transformer be found? Thanks again...Mike
 
  #4  
Old 12-31-00, 08:14 AM
R-12guy
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Yes the fuse is a DIY, Its located in the airhandler. that is the inside unit... have him turn off the power to the airhandler, and remove the cover, he should see a blower and another cover where all the wiring is...look on the board for a fuse, most now are the 3-5 amp type found in a car...if there is no fuse present, and some dont have... if he is ok with checking for power have him turn power on, and see if he has 24 volt between R and C.... this will let him know if transformer is blown, also check transformer for a mini breaker.. And for all reading this, let this be a lession to turn off power before doing anything, even as simple as a thermostat...
 
  #5  
Old 12-31-00, 08:21 AM
fjrachel
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Follow R-12guy's instructions and he should be able to make the repairs.
 
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