Fan Speed for Trane TWV036B140A1

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Old 12-12-13, 09:15 AM
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Fan Speed for Trane TWV036B140A1

Hey guys and gals,
I was wondering if you could provide some insight on an issue. I have discovered that my fan on my air handler seems to be stuck on low speed, atleast I think so. Basically im getting very little air flow from my vents and I dont hear the usual heavy rush of air going through the return vent in the house, plus the house is freezing all the time now.

My unit is configured as a downflow unit and I can hear a fan running in there but its very quiet compared to normal. I thought maybe there was a secondary fan, but according to the schematics I found that doesnt appear so. I do know its a multispeed fan so now I am wondering if its stuck on low speed for some reason.

I have tried cycling the breakers for the air handler and when I do I can hear the fan start up like its going to go full speed and then it just cycles down to low immediately.

Anyone have any ideas on this one? I recently (about 4 months ago) installed a nest thermostat, which im not happy with, so I am wondering if that could be part of the problem. My air handler was made in 92 according to the stamp on the panel.
Thanks in Advance,
Chuck
 
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Old 12-12-13, 10:30 AM
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If this unit is not a gas furnace verify that your stat is configured for electric heat so the stat controls the fan in heat mode.
 
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Old 12-12-13, 10:41 AM
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Welcome to the forums.

Is this a heat pump with electric reheat coils ?

Manual link........Trane split system air handlers .pdf
 
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Old 12-12-13, 11:12 AM
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It is a heat pump, not sure about electric reheat coils though. Its all electric though no gas and the thermostat (nest) says its configured for electric.

The link to the manual you posted contains the info for my unit.

Nest says Heat Source is: Electric
Heat Type is forced air

W1=aux. heat
Y1= heat / cool
C=24V common
Rc=power
G=fan
O=heat pump
*=emer. heat
 
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