furnace cleaning

Biged

I bought that attachment for the vacuum hose and it worked great, I also will try that non metallic tube, I never thougt of that plus I always have that being an oil guy.So thanks for your suggestions.
The first furnace I did this week had a cracked heat exchanger, I found this out by visual inspection, so what is the easiest way to check for cracked heat exchanger.I decided to put my fyrerite pro probe into the plenum and pull the fan wire so the air wouldn't dilute the gases if it were present. is this the correct way?

thanks.

Rookie_3

Hi Ed, glad the snorkle worked out for you. The non-metalic set up Clay suggested works good also and you can do the same thing with a piece of garden hose. You can probably get an assortment of cracked heat exchange answers from CO testing to smoke bombs.

Gary Reecher

Check here

for heat exchnager inspection methods http://hvac-talk.com/vbb/showthread.php?threadid=57945