Convection Fan Only Runs on HIGH

[jonnyk45]

I have a Breckwell SP22. Recently, it began running the room blower fan on HIGH, immediately at start-up, and no matter what heat level is set. I took everything apart and cleaned both fans inside and out. I have been reading about testing the high limit sensor and low limit sensor, the blower motor itself, or that it could be a bad control board.
I am new to electricity stuff. I have a multi-meter - I am just wondering for sure where to start and how to do it correctly. Any help would be greatly appreciated!
Thanks!

 

[Ssyko]

First thing to check is your low limit/proof of fire snap disc. It will be on the combustion blower housing. It has 2 brown wires, put your multimeter on the continuity/diod setting and pull the 2 wires off and connect the probes on each spade. If you get anything but an open circuit it is bad. Do this with the stove off and cold.

 

[jonnyk45]

First thing to check is your low limit/proof of fire snap disc. It will be on the combustion blower housing. It has 2 brown wires, put your multimeter on the continuity/diod setting and pull the 2 wires off and connect the probes on each spade. If you get anything but an open circuit it is bad. Do this with the stove off and cold.

Thanks for responding. Now my question is: “get anything but an open circuit”... how do I know? What will it look like?

 

[jonnyk45]

Thanks for responding. Now my question is: “get anything but an open circuit”... how do I know? What will it look like?

 

[Ssyko]

Touch your leads together. Does your meter beep?

1st pic is an open circuit
2nd pic is a closed circuit

 

[Mt Bob]

If you are not comfortable around electricity,just replace the switch,they are cheap.And,if still acts up with new switch,99% it is the control board. https://www.stove-parts-unlimited.c...22-low-limit-thermodisc-13-1124-p/13-1124.htm

 

[jonnyk45]

Touch your leads together. Does your meter beep?

1st pic is an open circuit
2nd pic is a closed circuit
View attachment 242226
View attachment 242227

My multimeter is cheap so I don’t think (or haven’t heard or found anything) that it beeps.
When I put it in diode mode and touch the leads, the numbers on screen bounce around, eventually into “00single-digit”

So I touched the brown wires. Doing it one way just showed “1” on my meter; switching the sides with black and red fired up the motor and gave me readings in the 1100s

Is this the bad part or is that exactly what it should do?

 

[zrock]

I think your in over your head. Stop before u get hurt or cause more damage. Call a buddy with a good meter and knows how to use it. U will thank yourself in the long run

Sent from my SM-G950W using Tapatalk

 

[Ssyko]

You probably smoked that harbor freight meter. The power coming out of the control board is 120vac. I would recommend finding someone you know that’s familiar with a meter. 120 line voltage will bite. If you continue put the meter on AC, that is what your testing.