Lennox Winslow ps40 problems

[Mcam13]

Hi everyone, i just acquired 2 used ps40 pellet stoves, one works mostly and one not at all, hoping for some insight.

The one that works, has a tendency for the fire to go out after about an hour. It does not have a thermostat and there is no jumper in the thermostat terminals, could that be a problem?

the other stove does not turn on at all, no status LEDs or anything. Fuses are good. I dont want th throw a control board at it due to cost of it.

thanks for any help

 

[Mcam13]

Well the one with no power is a bad control board...so i got hosed on this deal

 

[johneh]

For Manual operation, you need a jumper wire in the thermostat block
Do you have a manual if not here is one

http://www.homeandhearth-mainst.com/winslow.pdf

Welcome to the forum

 

[Mcam13]

I put a jumper in and so far it seems better. As for the other, guess i need to see about getting the board repaired or replaced

 

[Ssyko]

On your dead stove check the snap disc’s the high limit disc may be resettable. Small button in between the wire connectors. The high limit may kills power to the stove.

 

[Mcam13]

I took the board from the bad one and put it in the known working stove and it wouldnt power up, its a bad board for sure

 

[Ssyko]

Ahh ok. Anything on the board look burnt or missing?

 

[Mcam13]

Nothing looks burnt, but that doesnt mean much. Im an electronics tech by trade, more often than not there is no physical evidence of failure. Some of the triacs have wird resistance measurements but without a schematic it could be normal.

anyone have a board schematic?

 

[Ssyko]

There are none. Manufacturers will not release them. Reverse engineering them is best. But no power at all i would look at the step down transformer, if it has one. I have never seen one like yours

 

[Mcam13]

The good thing is i could shotgun every part except the programmed microcontroller for about 20 bucks. But yeah i think the primary opened up on the transformer

 

[Mcam13]

the transformer was 10 dollars on digikey, so we will see if thats all that is bad