Suburban NT-40 is throwing a breaker ....:

[fkloster]

Please help if you can. 20 year old Suburban NT-40 furnace blows heat for about 3 to 5 minutes.... then throws its 15 amp breaker. I reset... it runs for 3 to 5 minutes.... then throws its 15 amp breaker again. Regardless of other items in coach being on or off. This is while being plugged into 50 amp service, or while on gen power.

Am I toast or is there a trick I'm missing? It still heats coach..... sometimes it even runs to about 7 minutes :P

thanks in advance

[bullydogs1]

I bet the fan motor is about shot and pulling too much current. I bet if you replace the fan motor, your problem will go away.