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This furnace has become a nightmare. My problems started with an Inducer motor stuck that wouldn't turn. We replaced it but the new motor wouldn't always work. I would have to spin the fan blades inside then turn the furnace back on for it to take off. Next we replaced the black control box thinking it wasn't carrying the correct power to start the inducer motor. Same problem so we took the new inducer motor back thinking the centrifigal switch was bad in it. SECOND new motor won't hardly start on it own at all. I have to spin the fan blades inside and turn the furnace switch back on to get heat. Please Help
Thanks,
Basil

I'm no heating expert, but the first thing that comes to my mind is to check the voltage. Greg

Are you getting 120vac to the motor ?

Is there a diagnostic bulb flashing on the control board ?


Thanks,
Robert

Robert wrote:Are you getting 120vac to the motor ?

Is there a diagnostic bulb flashing on the control board ?


Thanks,
Robert

Yes on both. The light reading which is one flash says it's a "Inducer centrifigal swith is or was stuck closed"

Hi,

IF the inducer draft motor is getting 120vac and not losing it during cycle, the motor should run IF wheel is not lodged or damaged.

Then, if it gets to correct speed and airpipe is not clogged up, the centrifugal switch should close.


Make sure you have 24vac to one side of cent. switch.

If this has been done already, then may be time for an hvac tech to diagnose through testing.


Thanks,
Robert

Robert wrote:Hi,

IF the inducer draft motor is getting 120vac and not losing it during cycle, the motor should run IF wheel is not lodged or damaged.

Then, if it gets to correct speed and airpipe is not clogged up, the centrifugal switch should close.


Make sure you have 24vac to one side of sent. switch.

If this has been done already, then may be time for an hvac tech to diagnose through testing.


Thanks,
Robert

I had a Hvac tech fix it today(I hope). It turned out to be the switch inside the inducer. Thats the third motor. Luckily they were all under warrenty so I only had to buy one. I made sure this one was not in the same sequence of serial numbers. Whats the chances of getting 2 bad inducer motors?

Anything is possible. Haven't had that happen in 31 years of this, but know it could tomorrow.

Glad it is running again.


Thanks,
Robert

Robert wrote:Anything is possible. Haven't had that happen in 31 years of this, but know it could tomorrow.

Glad it is running again.


Thanks,
Robert

Thanks for the help. I'll be using this site quite a bit as a mobile home owner. I'm glad I found it and there are people like you willing to lend a helping hand. Thanks again

You're very welcome, happy to help.



Take care and best wishes,
Robert