Help! My Speed Queen is dead.

[combo52]

Faialed Motor Boards On SQ FL Washers

The board builder used a component that did not live up to the quality specified and had a very early failure.

 

A surge protector would not help and is unnecessary as there is one built into this board, these boards did not fail because of voltage surges.

 

John L.

 

[kenwashesmonday]

Pray tell, what is this mystery component?

 

[mieletag]

If the control board that was replaced was the motor control board, I'll hazard a guess and say it was a failed NTC thermistor or solder joint or even circuit board trace.

Most motor drives I have seen fail is usually caused by overheated thermistors and the connection to them.

 

[rolls_rapide]

"Pray tell, what is this mystery component? "

Perhaps it was one of those 4 or 8-legged transistor diode packages, which seem to get superseded by versions a tad more robust?

 

[danmantn]

For your viewing pleasure. The dead board. The washer does seem to spin better now may be my imagination now. Not so quick to chicken out on heavy loads.

 

[speedqueen]

I'd love to see someone diagnose what's wrong with the board, I bet someone could figure it out pretty quick with little more than the diode check function on a new meter. Perhaps a shorted transistor(one of the mosfets that controls it).

 

[combo52]

Hi Richard, Good to see you posting, I would be glad to send you a bad motor board [ or 5 or 10 even ] if you want to try fixing it, but I suspect it needs a fairly sophisticated part, I tried to get Core-Centrics to fix one for us and even they said they did not have the parts and expertise to do it.

 

John L.

 

[lukes]

danmantn, can you pop the PCB out and take pics of the back? I have never dealt with Speed Queen boards but a common failure point on boards like this are the solder connections of the connectors