I fell in love with my new house fast. After I moved in, I reveled in the extra space, the luxurious kitchen, and the awesome master bathroom. Unfortunately, since I moved in during the winter, I didn't have the chance to inspect the functionality of the AC unit. When summer arrived, I realized that my place was musty and hot—no matter how frequently my system was running. Because it was difficult to figure out what was wrong with my system, I decided to set up a blog dedicated to making it easier for other people to troubleshoot theirs. You never know, this information could make your home a little more comfortable this summer.
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Troubleshooting My AC Unit
How To Repair The Draft Inducer Motor Assembly On A Gas Furnace
Venla Heinonen
The draft inducer motor assembly on a gas furnace pulls air through the system, then passes that air outside the house. The fan is a vital part of keeping the heating system equalized. A broken or malfunctioning draft inducer motor can lead to overheating, which can either cause the unit to cycle on and off quickly or to stop kicking on at all.
If you have already ascertained that the draft inducer motor is the problem with your unit, switching out the malfunctioning assembly for a new part isn't overly difficult and doesn't require any special tools.
What You Need:
- Screwdriver
- Digital camera
- New draft inducer motor assembly
Step 1: Gain Access to the Motor Assembly
Turn off power at the circuit breaker and the gas supply using the shut-off valve on the supply line going into the furnace. Detach the exhaust vent from the outlet port on the exterior of your furnace. The vent tube should simply twist off.
Use a screwdriver to remove the screws from the upper access panel on the back of your furnace. Lift up to remove the panel door and set the door aside.
Locate the pressure switch using your owner's manual diagram for help, if needed. Detach the vacuum tube from the pressure switch. Remove the screws that fasten the pressure switch mounting bracket to the furnace body. The switch will still be attached to the furnace via wires but that's fine. You only need to move the switch out of the way and removing the bracket then letting the switch hang to the side will achieve this result.
Step 2: Unhook the Old Motor Assembly
Take a picture of the wire orientation of the motor supply wires if you are worried you will forget. Disconnect the wires in order – meaning, disconnect the wires closest to you first and then work your way back. The last wires you disconnect will be the power supply wires for the assembly.
Remove the motor assembly mount's screws. Pull the assembly out of the furnace using caution while lifting the assembly over other parts and wires.
Step 3: Install the New Motor Assembly
Place the new motor assembly in the same spot vacated by the old assembly. Reattach the mounting screws.
Hook the wires up to the new motor assembly starting with the power supply wires. Connect the wires working in a forwards motion and using your picture for help with orientation, if needed.
Pick the dangling pressure switch up and hold the mounting bracket back where it belongs. Fasten the mounting bracket in place with its screws. Twist the vacuum tube back in place.
Replace the upper access panel door and fasten into place. Turn on the gas supply shut-off valve and the electricity. Run your unit to see if the problem is fixed. If the unit is still rapid cycling, call in a furnace repair company.
You can get more information from a company like Marino's Plumbing & Gas Fitting AC.
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