Modine Hot Dawg 30000

[rcull]

I have a 30000 BTU Hot Dawg heater. It has been running fine for 3 years. Last night, it had a problem.

This morning the circulation fan was running but blowing cold air. I cut the power and restarted it, only the circulation fan came on. It has gas, because the line services other items and they are working. It responds to thermostat settings.

The circuit board has a solid green light, the yellow light does not come on or flash.

I notice an early start item is Power exhauster cycles on. It is not coming on. I pulled the plug on the line, thinking I should get a reading of 115 volts. I did not seem to. I will check this again. I guess this could be either a failure of the Power exhauster fan, or the main board. I expect I can eliminate the fan by supplying it directly with 115v to see if it works.

Am I on the right track, or have I missed something?

Thanks!

 

[Showkey]

Your on the right track.........

If the Power exhaust Is NOT working ......it should throw a code.
Check the fuse on the board. The fact the t stat is responding the fuse is likely good.
Look for burnt or scorched areas on the board......... does it smell burnt ?
Try spinning the exhaust by “hand” ( manual) to verify it’s not stuck or seized.