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      • Check to see if the furnace blower comes on when you jump the control board contacts for the red (“R”) and green (“G”) wire terminals. If it does, then it's likely the WiFi thermostat is defective and unable to alert the furnace control board to turn on the blower. You will need to replace the WiFi thermostat to regain control of the blower.
      www.repairclinic.com/RepairHelp/How-To-Fix-A-Furnace/177-383--/Coleman-Furnace-Blower-Not-Running
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  2. Mobile Home Furnace Blower Will Not Come On. If your blower does not turn on, first look through the viewing hole above the gas valve and see if the burners have lit. If you don’t see them burning, then jump to the burner won’t light section.

  3. Why the blower fan won't come on when the heating elements cycle on when the blue wire is on M2. Could it be that given that the M2 terminal with 120VAC to ground is not giving the blower fan 240VAC? The only parts replaced have been the heating elements and the sequencer.

  4. Nov 24, 2022 · Small possibility an issue with the furnace turning on the fan - Turn off the furnace, turn FAN to ON via the thermostat, turn on the furnace, fan should start right away - see if it goes through the ignition, etc. and whether it stays on or cycles.

  5. Nov 12, 2023 · What to do when your furnace blower won’t turn on. The first thing that you should do if your furnace blower isn’t turning on is change your thermostat to fan-only mode. Fan-only mode (also called fan mode) does not heat or cool your home. It only turns the blower on.

  6. Oct 7, 2017 · Correcting these shorts, the blower now does not come on by itself anymore (no more 'ghost' fan starts), only operating with the thermostat in place or if I short the wires. However,-- The thermostat itself is also broken.

  7. Pilot stays on but the furnace doesn’t come on, step 3. Replace the limit switche (s). You MUST know the brand and model number of the furnace to get the proper replacements. It will be helpful if you have the part number of the switches.

  8. Nov 22, 2021 · Reasons Your Furnace Blower Won’t Turn On. 1. Its a Thermostat Setting Issue. Most thermostat issues originate at the thermostat, and blower motor issues aren’t different. If your blower isn’t turning, you most likely have a faulty thermostat.

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