blower fan

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  #1  
Old 03-22-02, 11:00 PM
mcburns
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blower fan

My blower works great and continuous when the A/C is on but not when the heater is on. It's a combo unit and uses the same blower. When the heat is on, the blower will run for about five seconds, switch off for about 15 seconds, on for 5 seconds, etc. I though it might be the relay switch, however, I should have the same problem with the A/C. Any suggestions?
 
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  #2  
Old 03-23-02, 05:13 AM
PDF
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Could be relay

Your combo unit runs high speed for a/c and a slower speed for heat.This is done thru a relay.Does fan run okay if you place tstat to fan "ON" and then turn heat on?How old is unit?Does it have a solid state board?PDF
 
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