Thermo couples

GTD

I have a utica gas hot water boiler, model #M75AGB, serial # BB04404. What could cause the thermo couple to not work?  I had to replace it three times since december. Any help would be great. Tom

Charlie from wmass

how large is the pilot?

is this a standing pilot boiler or spark ignition?

GTD

thermo couples

It is a standing pilot boiler>

Charlie from wmass

too large of a pilot flame

or thermocouple too deep into the flame because something got bent can cause issues. are you sure it is the thermocouple that is the problem?

GTD

Thermo couples

Yes because i try to clean it  will not light, i change it all is fine for a few months , then it will not light.

Techman

Thermocouple

I seriously doubt that you encountered that many bad t'couples.You need a Millivolt meter to test how much electricity( volts ) is being produced by the pilot flame.

GTD

Thermo couples

Thanks everyone for the help. Tom

Charlie from wmass

It is a thermo couple not

a thermo pile, right?

GTD

Thermo couples

It is a thermo couples.

Tim McElwain

GTD do you have

a multi-meter that will measure millivolts? If so then go up and click resources, then library and look for Tims closet there is a procedure for checking thermocouples there.

GTD

Thermo couples

Tim thank you for the info. Tom

Tim McElwain

Tom, the

Utica boiler has a tendency to burn up thermocouples especially when it is cold and the boiler is running a lot. There is a thermocouple from Johnson (now Baso Gas Controls LLC) it is the K16LRA nickel plated corrosion resistant and hi-temp thermocouple. It is a little more expensive but it will out last most T'couples 3 to 1.

GTD

Thermo couples

Tim ,  thank you.

Bob Harper

chimney?

If the chimney is not venting properly, it can spill CO2, which displaces O2 causing pilots to snuff out.