7655-856 Motor Problem
Posted: Sun Nov 25, 2007 1:45 pm
Hi folks. First I'd like to say thank you for providing such a valuable resource. This is a fantastic website.
I have done some searching in previous posts, but have not yet found the exact answer to my question, so I'm hoping you can help me out.
I have a Coleman model 7655-856 furnace. This morning when I got up and turned up the heat the furnace started up as normal. After an hour or so I turned the t-stat down because it was plenty warm. A while later my wife got up and thought it was chilly so I turned the heat back up. The burner fired up normally but after the 1 or 2 minutes of pre-heating, the blower motor did not cycle on as it should. It sounded like a humming noise coming from the motor. I turned the t-stat back down and still heard the humming noise for a while, then it stopped.
After waiting a while I tried again. Still no go. The blower motor is not turning. So, I did a little trouble shooting. When I manually turn the fan with my hand it does not continue to rotate freely. It seems to have some friction and it feels like there is one particular point in the rotation that is "stickier" than the rest. After trying to get it to start there is some heat built up on the motor, but I'm not sure if that is from the motor itself or from the rising heat from the burner.
During another test I saw that the blower was trying to turn, but it was turning very, very slowly. I tried giving it a little help by turning the blower with my finger, and it went a little faster but not as fast as normal. Now it won't even do that. It turns really, slow and when I try to help it with my finger, it won't pick up any speed.
I'm thinking that the motor is bad. What do you guys think? If the motor is bad, how difficult will it be to replace it. I'm somewhat mechanically inclined but I'm certainly not an electrician. I am willing to replace it myself if you think this is something I can do by myself.
Thanks in advance for any advice you can offer.
Joe
I have done some searching in previous posts, but have not yet found the exact answer to my question, so I'm hoping you can help me out.
I have a Coleman model 7655-856 furnace. This morning when I got up and turned up the heat the furnace started up as normal. After an hour or so I turned the t-stat down because it was plenty warm. A while later my wife got up and thought it was chilly so I turned the heat back up. The burner fired up normally but after the 1 or 2 minutes of pre-heating, the blower motor did not cycle on as it should. It sounded like a humming noise coming from the motor. I turned the t-stat back down and still heard the humming noise for a while, then it stopped.
After waiting a while I tried again. Still no go. The blower motor is not turning. So, I did a little trouble shooting. When I manually turn the fan with my hand it does not continue to rotate freely. It seems to have some friction and it feels like there is one particular point in the rotation that is "stickier" than the rest. After trying to get it to start there is some heat built up on the motor, but I'm not sure if that is from the motor itself or from the rising heat from the burner.
During another test I saw that the blower was trying to turn, but it was turning very, very slowly. I tried giving it a little help by turning the blower with my finger, and it went a little faster but not as fast as normal. Now it won't even do that. It turns really, slow and when I try to help it with my finger, it won't pick up any speed.
I'm thinking that the motor is bad. What do you guys think? If the motor is bad, how difficult will it be to replace it. I'm somewhat mechanically inclined but I'm certainly not an electrician. I am willing to replace it myself if you think this is something I can do by myself.
Thanks in advance for any advice you can offer.
Joe