Hot burner motor

Dirk Wright

Thanks Ragu. I checked the temperature this morning and the motor is running much cooler. I can put my hand on it indefinitely I think. I think everything is OK, but I will buy the ammeter someday and check it.

Dirk Wright

I have a Beckett AFG burner in my furnace which I upgraded last August with a new PSC burner motor, blower, coupling and cleancut pump. I also upgraded the controller to a R7184. It's run flawlessly all winter long, but I went to check on it the other day and found that the burner motor was too hot to touch for more than a few seconds. The rest of the burner is much cooler than the motor. I thought that my Garber filter may have been the problem, since the vacuum gauge was reading about 5 in Hg, so I replaced it. Now the vacuum is much lower, but the motor is still hot. There are no funny noises or vibration that I can see. I have not measured the current draw for the motor, and I dont' know if I can do that with the little VOM that I have, so I can't tell if it's drawing more than specified. The blower was set to the manufacturer's spec and everything seems to turn freely so I am wondering if this motor typically runs hot or is there something else I should check? thanks for any help.

Ragu

Dirk...

Take a current draw of the burner motor with an inductive type ampmeter (Amprobe is one brand) and compare it to the motor specs.

You could also do the same thing to the blower motor.

Additionally, you could take the motor temp. and compare it to specs.

When dealing with electric motor temperatures,"hot" can become a subjective item. Good luck.

clammy

last cleaning ?

In the past i have seen some hot burner motors usually cased by the furnace or boiler being dirty and running a high stack temp it seems that the front combustion plate which if removed gives access to the combustion chamber was quite hot causing the burner motor to gey quite hot .I have seem this mostly on wet based cast iron boiler but have seen this on a few hot air furnaces also it will of course shorten the life span of a motor .This is usually caused by a dirty boiler or furncae ,not enough draft over fire and or over fired .In my experence also of times most guys don,t want to pull the clean out plates and or combustion access door off to clean the combustion chamber or the top of the combustion chamber deflection plate which after that detorates will casue super high stack temps and damage the combustion chamber of most hot air stuff .Just my 2 cents .Peace and good luck clammy