I’m having problems with an oil fired forced hot air furnace. It had been working fine, but since it had been several years since it had been serviced, I decided to opt for the “tune up” offered by the oil delivery company. Since the tune up, the house has the smell of diesel exhaust. I’ve had the company that performed the tune up out twice since the tune up, but still have the stink. I’d rather give this job so a seasoned, trained pro, but you can see where that’s gotten me so far, so I think I’m on my own. The adjustments done by the techs resulted in -.03 draft and trace smoke. However, when the burner fires after the stat calls for heat, there’s a big puff of smoke and it seems that some of that smoke escapes and finds its way into the return and then gets circulated throughout the house.
Apparently, the guy who came to do the tune up installed a .75/70° W nozzle, the last guy installed a .65/ 70° W nozzle. At this point, I have no idea what the original configuration was and I’m desperate for suggestions. The burner is a Beckett AFG, the furnace is a carrier 58 CMA. Any thoughts are greatly appreciated.
Replies
I'd be worried about a perforated heat exchanger.
Beware.
I was wondering abou that too. The unit is relatively new and I didn't have the problem before the tune up. Is there anything the guy could have done that would have compromised the exchanger? Only a relatively small part of the exchanger can be seen through the inspection ports, but I don't see any obvious damage. How would i inspect for damage?