blower fan does not run on cool cycle - http://www.hvacmechanic.com/ Forums
Original message
| nb123
 |  "blower fan does not run on cool cycle"
, posted Wed 16 Jul 22:41:  
Furnace blower/fan does not run when t-stat set to 'cool' and fan set to 'auto' (outdoor condenser and outdoor fan does come on and run with this setting) -- Furnace blower/fan does run normal when t-stat set to 'on' and also when t-stat set to 'heat' and fan set to 'auto' --
Changed t-stat but same condition --
Any idea what the problem could be ??
(York P1DUC* furnace/ Honeywell programmable t-stat)
nb123
[this message was edited by nb123 on Wed 16 Jul 22:42] |
| Replies:
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| presscold
| "Re(1):blower fan does not run on cool cycle" , posted Wed 16 Jul 23:18
looks bad board or cooling cycle blower motor relay.Also hotwire high speed tab of motor and see what would happen.,
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| | nb123
| "Re(2):blower fan does not run on cool cycle" , posted Thu 17 Jul 08:36
hotwired hi speed tab and motor ran -- where is the cooling cycle blower motor relay ?? is it part of the board ??
nb123
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| | presscold
| "Re(3):blower fan does not run on cool cycle" , posted Fri 18 Jul 07:59
Your info is incomplete . Still we donot konw how old is your system and It has control board or not.
Black wire of blower motor which should be connected to cool terminal of the board is your high speed tab.
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| | nb123
| "Re(4):blower fan does not run on cool cycle" , posted Sun 20 Jul 09:37
furnance is 8 years old -- it does have a control board (seems to be more of electronic solid-state board -- do not see any relays)-- the fan motor runs when power is jumped to the cooling tab
nb123
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