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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22626
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have an old Intertherm furnace I need to service. There

Customer Question

I have an old Intertherm furnace I need to service. There are no obvious cleaning ports. There is however a round port that has the viewing glass. It seems that is sealed with furnace cement. Is it worth removing that to try to clean the heat exchanger through that port? See attached pictures.
Submitted: 1 year ago.
Category: HVAC
Customer: replied 1 year ago.
Also the nozzle is very black. However, I'm not sure how to check if it needs more air since I can't find a hole to insert the analyzer.
Expert:  BillyHvac replied 1 year ago.

I am very sorry your question has not been picked up yet.

I just logged on and found you had not been assisted.

Please let me know if you still need help and I will do my best. Please do not "Rate" as we have not worked toward an answer yet.

If you would like to proceed let me know by replying.

Customer: replied 1 year ago.
Hi I still need help.
Customer: replied 1 year ago.
Please help
Expert:  BillyHvac replied 1 year ago.

these are tough to set up properly.

Most of the set up is sight on the flame because this unit uses a pipe inside a pipe exhaust. The center is exhaust and intake is the outer pipe. So if you drill into vent you drill into outdoor air section first...then into exhaust. For this reason it is a pain but analyzer is used at exhaust exit outside.

You can set oil pressure ok..but checking draft and CO on this unit is a challenge.