Intertherm electric furn.my blower motor locked up so i replaced
My original blower motor locked up so i replaced it and now it cycles on and off like every minute. The fan will run till i cut it off,hot air comes out vents called the guy i bought the motor from but not to much help there but told him how i hooked it up and said it sounds right im just wondering if its the blower relay or something with the sequencer
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Re: intertherm electric furn.my blower motor locked up...
If you can explain where each wire from the motor goes I might be able to help. This way were on the same page. You may have 2 speeds comming on at once. Use an AMMETER to see if your running over amps and be sure you check it with the blower doors closed and clean filters all these can affect correct ammeter readings.
Other wise remove all wires (except the one going to the normally closed contacs on the fan relay, and the 1 going to L2 (usually called common) and the 1 or 2 going to the run capicator this may;leave with 2 to 4 wires. Tape them up sepperately and try it again. If it improves and workd mor correctly youmay have a bad relay. If it dosnt you may have a bad relay or sequencer depending on how its wired.
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I googled: Intertherm Air Conditioners There are a number or articals that may help you find what you need. One referance to a youtube "review" Hope this helps. I was going mention "how do you know it's a bad blower motor? But depending on age and use anything is possible. Usually the motor has a model number on it. That would be the safest way to find an exact replacement.
The motor is a 'sleeved bearing' motor, not a sophisticated 'ball bearing' type motor. The bronze sleeves probably need lubrication. Some motors have no oil ports, and are referred to as 'permanently lubricated' motors. If you have oil ports, they will be approximately 1/16" in diameter near the top with little yellow plastic or gray pewter plugs in them. Remove the one plug you should be able to see and gently drop 30 drops of light weight oil into it.
The oil will slowly saturate the felt 'wick' that surrounds the sleeve bearing. The second oil port will probably be inaccessible with the blower installed inside the furnace and unless you are pretty handy, should be left for a pro. Unfortunately the oil port that is inaccessible is the bearing that carries virtually all the weight of the squirrel cage blower and is probably the culprit.
Another possibility is that the capacitor could be bad. With a bad capacitor, it probably wouldn't start on its own at ALL. Also the motor would overheat and would cycle on its internal winding thermostat.
You most likely have a bad fan limit / cycling switch. If you kill the power to the furnace see if you can trace the wires from the motor to where the connect to the switch. It looks like a round button with tabs sticking out of it for the wires to connect. Mark down where the wires were connected and take it to a HVAC business or furnace supply house. Be sure to have the model off the furnace with you so you can get the correct parts.
R u saying that the blower motor works for the AC but not for the heat. If thats the case then u have a t-stat or control board problem. u can jump the red white and green wire from the tstat. if that works then then tstat needs to be replaced if not the control board is the problem.
Your blower motor has several speeds to it and by the problem you are having it sounds as though the blower motor may be going out. The motor has a slower speed for the heating cycle and since you have the noise in the heating mode I suggest having the blower motor changed as soon as possible since it could cause other problems in the heating section of the furnace( possibly burning out the high limit switches). Good Luck on your repairs hope this helped
The blower is smoking because you have it hooked up to the same wires you've hooked the electric coil to. That coil runs on 240 volts. Those wires are typically red and black. The motor runs on 120. One of the wires should be shifted to a neutral (white wire). Assuming the motor is still alive...this will fix it.