Coleman Furnance Question
Posted: Thu Mar 20, 2008 8:52 am
Had problems with my Coleman furnace, sorry I don't have the model number here with me at work. I will post that later. The furnace is an older model, 1992 ish. I have had a service tech here to work on the furnace, let me tell you the story.
Call for heat sent to the furnace, furnace would light the burner and run for a period of time, then the burner would go out, fan would not start. Upper limit switch kept 'popping' off. rest the limit switch and the fan would kick in. Tech replaced the limit switch, said it was old, and it worked fine for a few cycles. Then it started the same thing over again. Call for heat, burner lights, goes out, but fan would not kick in, tech replaced a fan switch. Then one night, a week later, the furnace fan was making a bad screeching noise, then locked up. Tech came out and replaced my fan motor, motor had locked up.
Today, the furnace still does not operate correctly in my mind. There is a call for heat, the burner lights and burns for a bit then it goes out. After the burner goes out, the fan kicks in anywheres from 10-50 seconds after that. While the fan is running, the burner will kick back in again. The tech told me that this is normal and that there is no problem with this type of operation. Does that seem normal?? The last thing I can add is that the furnace fan does not run on a timer, the tech did tell me that. Initially he felt it might be a timing issues with a fan timer, but that wasn't the problem.
Call for heat sent to the furnace, furnace would light the burner and run for a period of time, then the burner would go out, fan would not start. Upper limit switch kept 'popping' off. rest the limit switch and the fan would kick in. Tech replaced the limit switch, said it was old, and it worked fine for a few cycles. Then it started the same thing over again. Call for heat, burner lights, goes out, but fan would not kick in, tech replaced a fan switch. Then one night, a week later, the furnace fan was making a bad screeching noise, then locked up. Tech came out and replaced my fan motor, motor had locked up.
Today, the furnace still does not operate correctly in my mind. There is a call for heat, the burner lights and burns for a bit then it goes out. After the burner goes out, the fan kicks in anywheres from 10-50 seconds after that. While the fan is running, the burner will kick back in again. The tech told me that this is normal and that there is no problem with this type of operation. Does that seem normal?? The last thing I can add is that the furnace fan does not run on a timer, the tech did tell me that. Initially he felt it might be a timing issues with a fan timer, but that wasn't the problem.