HVAC Blower will not shut off


Old 05-09-18, 07:53 AM
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HVAC Blower will not shut off

Hi I have a trane unit TWE060b150b0 and the blower runs constantly i have had two havoc techs out with no solution. contactors have been changed and even unplugging the controls board the fan still runs i have even completely unhooked the thermostat and its till running. its also calling for heat when the thremostat is connected any help would be greatly appreciated
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Old 05-09-18, 02:36 PM
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Are you saying that you have the stat heat?
Old 05-09-18, 04:16 PM
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Welcome to the forums.

That model number is close to a heat pump air handler. If you have electric reheat coils in that air handler then a likely problem is a defective sequencer. A sequencer is a timer and relay in one. It controls the blower when in heat mode. They get stuck with the blower section on.

I'm trying to locate a service manual. That unit may use a timer module for the blower.

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