R8285d 5001 Fan coil relay

Ifollowinstructions

Burnham boiler 204 NIL - TE12; 2 year old boiler- no melted wires, good condition relay burns our replace it and its fine for 2 hour's then burns out again- install 2nd relay same thing. I bypassed the damper and it still burnt out.



Also happened recently on a new Utica boiler- we replaced

the damper & it was fine.



Lastly- when a transformer overheats/ smoke coming out of it & you shut the switch off right away is it really blown? Will the transformer be fine when it cools down?

Jamie Hall

I'm no expert

on the wiring of your boiler.  However, there are general rules -- and one of them is that a relay coil or transformer overheats or burns out it's getting too much current.  In the case of a relay coil, either the voltage is too high or somewhere in the circuit there is supposed to be a resistance and isn't.  It should say, somewhere on the relay, what the rated voltage is, and you could check that.



And in answer to the last question -- sorry, but yes.  If a transformer or relay coil overheats and smokes, or you see any distortion on the coil at all, it's gone.  There's always a chance it may work for a while, but it's not trustworthy nor particularly safe -- and there is no way you can shut it off by hand to save it once it starts to show signs of problems.