I've got an old Espar unit, D7L. This is the big orange bus heater. It fires up well, smokes very briefly and then runs great for a while. Then it will suddenly start smoking badly for a minute or two. Usually shut it off when that happens but no problem restarting. It runs good again for half an hour or more before doing it again. I would like to get inside to take a look at the burner, screen, etc. I hear these need regular maintenance/cleaning and maybe that will improve things. I realize that with any major problems this is a paper weight but it seems like it runs decently. Maybe just dirty and loses flame occasionally.
The question is how do I get in there? I pulled the intake end off and removed the fan impeller and the motor. The burn chamber seems to be sealed from that end. Then I pulled off the output end and that's a mile away with the heat exchanger in there and doesn't look promising either. There is a service panel on the top that I haven't removed. It looks like it just gives access to the wiring connections inside.
Does anyone have a tip on how to service this guy?
The question is how do I get in there? I pulled the intake end off and removed the fan impeller and the motor. The burn chamber seems to be sealed from that end. Then I pulled off the output end and that's a mile away with the heat exchanger in there and doesn't look promising either. There is a service panel on the top that I haven't removed. It looks like it just gives access to the wiring connections inside.
Does anyone have a tip on how to service this guy?