Power vent, burner, upstairs thermostat no power?

ColdMainer

My new yorker boiler /furnace seems to have a short or a failed component or transformer? I know this because when it runs out of oil the power vent will continue to run. I shut the switch at the top of the stairs off to save on electricity. When I put more oil in I turn the switch back on, which turns the power vent on again, and then the beckett burner comes on. The primary control's light begins blinking and I start priming the pump process. Normal sequence of operation.

NOW the other day i got more oil, turned the switch at the top of the basement stairs on and no power vent. Everything seemed dead. Something has happened where it doesnt want to power on the power vent fan. The thermostat upstairs is also blank. The zone 1 box on the side of the boiler doesnt light up anymore. And the usual primary control blinking light is now blank. But I do see the light in the circuit board on the power vent which tells me that power is being supplied.

A little more info.. my low water cut off probe slowly drips water onto the bottom of the box. I did some work on it a couple christmases ago and used j.b weld to seal it the best i could to buy me some time. Probably last fall i noticed this repeated / rapid clicking i could here through the floor. It would actually cut the burner off and when it would stop the burner would come back on. I thought it was a loose connection somewhere in the low water cut off box.

I'd like to know how you guys would approach this? Very, very much appreciate all the help.

Jamie Hall

Well, step 1 is going to be to figure out how the unit is wired. There are several safety switches involved; some will be on the 120 volt power and some on the 24 volt. You need to trace the wiring and draw a diagram of it.

Then, step by step, from the emergency cutoff switch to the burner control, find out what is getting power and where it stops. Then find out why it stops there.

It may be the LWCO — it rather sounds as though that needs to either be replaced or completely overhauled. JB Weld is not a suitable repair product or sealant on a low water cutoff.

HydronicMike

Stop running out of oil. Call someone who knows how to use an electric meter to troubleshoot components.
Could be as simple as a bad thermostat, or it needs batteries.
The LWCO should be replaced. But first, take it out of the circuit to see if everything works as it should.

mattmia2

rapid clicking could be a lot of things but i your case i would be suspicious of a loos low energy wiring connection, but it could be a bad or loose relay too or bad contacts somewhere else