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i don't know. it may be your blower or your motor that needs to be inspecvted. be very careful. shut off power to furnace. turn thermostat to lowest setting. shut off circuit breaker for furnace or remove fuse for furnace. open blower panel; and pull drive belt [ i f furnace has one ]
that turns the blower. if it turns, the blower is OK i suspect the motor needs repair. https://www.repairclinic.com/RepairHelp/Furnace-Repair/36-383--/Coleman-Furnace-Troubleshooting
see your symptoms and click on 'see video' at right of
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Furnace blower not running ".........
Refer to page 8 of instructions that came with unit. You will need to call for repair, tinker with it and there may be not very pleasant experiences.
https://inspectapedia.com/heat/Gas-Furnace-Manual-Mobile-Home-Unitary-DGAA-DGAH.pdf
You need to check the motor amp draw against the spec tag on the motor. If the motor has power to the motor wires it's either the motor or the run capacitor.
Do you have 120 volts applied to the motor? Try spinning the blower wheel by hand, if this getsbthe motor running the capacitor must be replaced. If there is power to the motor and does not start up, the motor will have to be replaced.
Your furnace is shutting off on the high limit switch because of this. You are having a problem with the blower motor. You need to check for power from the wires on the board that feeds the motor. If you have voltage, and your run capacitor is good, you have a faulty blower motor. If its a fan relay, the fan would start and run all of the time. Check power to motor right after furnace shuts the burners off. Robert Horton
Yes. If the high limit is tripped, the furnace will bring on the fan continuously until the limit resets. Often, they will not reset if tripped repeatedly. If the furnace is too large for your application, you probably are not able to move enough air to keep the heat exchanger cool enough.
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