Weil Mclain LGB-8 Error Lights

dooododoo

Hi all, if anyone could help, it would be great.

On this Weil McLain LGB-8, I get 2 error codes:

On for 4 seconds and 3 blinks
On for 4 seconds and 2 blinks

And it then it repeats.

This happens after turning on the unit... I hear some clicks, the burners turn on, and then 5-10 seconds later, it shuts off. The pilot light looks good.

I’ve included the troubleshooting sticker. Can anyone tell me what the error code is saying?

JUGHNE

First and easy and free is to clean the flame rod/sensor.

dooododoo

JUGHNE said:

First and easy and free is to clean the flame rod/sensor.

Thanks for the suggestion. It was not the problem.

The Steam Whisperer

I've had a similiar problem in the past. The burner that has the flame sensor for the 2nd stage may not be lighting properly. Sequence of events is: Pilot lights, signal good, light main burners on low, tries to go to high fire, but flame sensor does not sense flame, gas shuts down. I have often had small spiders building webs in the gas orifices, restricting or blocking gas flow to a burner. Since the flame sensor burner all the way to the side, its easy to miss if it is not lite.

ch4man

an S8610U is a replacement module, maybe try the OEM.
those black box Honeywell's are less than desirable

ch4man

PS, Honeywell's must have a good burner ground