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i finally got an opportunity to work on this again. I checked the tag on the motor and it said 1.2 amps. I checked the motor while running and got 1.12 amps. so that seems to be within the acceptable range. i guess my next step is to check the orifice size and try to pull the vent pipe off to...

i dropped the unit 1 inch and no change. I will check amperage later tonight. I can check the orifice as well. i was eyeing that earlier today. Other owner changed it out because he had a small garage, and someone told him it would short cycle and not be very efficient. So he trading me for a...

3.5 wc is the operating spec from the manufacturer, which is what i meaxured and set.i looked up the fan speed and it was i believe 1500 rpm, butihaveno way thT i am awafe of to check that. it has been a usy week so iam just now getti g back to this. i will lower theheater an inch and or heck...

yep, checked to make sure, it is a single speed fan. Adjusted gas outlet pressure to 3.15 WC and it still tripped high limit. It is a capacitor run motor, not sure how to check that. Any way to check to see if fan is running up to speed? Anyone have one of these and can tell me of a way to...

pic attached this time

exhaust vent length is about 5 ft. I have a T shaped cap on it, Which i removed and ran unit, no change, still tripped limit switch. i honestly don't know if i will be able to lower the unit easily. i will need to take ta look at that. i will also check it to see what my rise is. I checked the...

I will check the wiring diagram, but when I took the high limit switch out of the heat exchanger area, the unit did not shut off until I shut it down so I would think that would indicate that the unit was actually overheating. When I measured it, the temp next to the high limit switch go to 25...

Fan is running the right direction, blowing out the front of the unit. Unit is level, flue has a very slight rise. Air is coming out of the flue, seems to vent pretty well. I do not know the temp rise in and out. I will need to borrow the neighbors meat thermometer again to check that. I have a...

Ok first let me apologize for not posting all the info. I was in a bit of a hurry and forgot to post some of the info. Unit is NG and very clean. Gas pressure has been checked and is set at 3.6 WC. I did run the unit with the walk in door open and there was no change. The fans seem to run fine...

I have a Reznor unit heater UDAP. 45,000 BTU. I installed it after trading with another guy who bought it new and used it for a few months. It is tripping the high limit switch. The board blinks 3 times, indicating a rollout switch according to the manual. Rollout switch tests ok. put a temp...