Recent content by Ken Smith

I've had too busy a week. I'll get more pics tonight and post them. I only bypassed the fan to check function - not with the burner on. It would warm the shop fine if it stayed on. I'll have more time tonight and will start the burner and keep the fan bypassed to see what happens. Let you know...

"Worth a thousand words"! Given the info you have - if this was your problem, what would you do next?

XMax, Sorry for the delay. I'll attempt to attach 2 pics. I wired around the fan switch. You can see the "clippy" in the pic. Fan runs fine, no cycling. Both fan and limit switches are correct and connected to the fan and transformer, respectively. Fan and motor were untouched, rotate...

I believe you are on to something. The fan is the only thing I didn't replace so it needs to be tested.

I will get some pics and post them tonight or in the morning. This is an old unit,, very basic. No boards, relays, etc. There are 2 sensors, a fan switch (F-140) and a high limit. There is a common line voltage feed to each with the fan switch feeding the fan motor and the high limit feeding the...

Temp has varied from 35 to 55. I've let it run, cycling, for about 5 minutes.

Hi ctfjr, The fan rotated freely so the only thing I did not change is the motor. It is quiet and smooth. There is heat coming out but it is not excessively hot. If it would run to satisfy the thermostat and not cut off after 10 seconds, I think it would do the job. Smitty

Hi Rookie2, I'm making a list of things to try - clipping around the fan switch will be first. I can't compare to the past since I never saw the unit in operation before I became the "proud owner" and have had to replace all the parts. Gas pressure is to spec but I am curious why you asked...

To ctfjr, The "Therm-O-Disc" sensor was so old that we had trouble cross referencing a replacement. My local HVAC parts house contact was able to find a new sensor, which I installed. It mounts in the housing above the heat exchanger compartment and protrudes through the normal round hole. It is...

HI all, I have rebuilt a nat. gas unit heater for my shop. There are no identifying labels so I don't know the brand. It could be 20+ years old, so is very basic. I have replaced all gas components; main valve, pilot & thermocouple. I have completely rewired the unit and replaced the only 2...