This duo-therm furnace has a bad 40 amp.breakerthis is part of a dual mount ite pushamatic breaker 40/60 amp cat.no.w-54800 furnace mod.306001-5

Push a matic are out of business BUT Ebay to the rescue.

push a matic, great deals on on eBay!

These are 50 amp.

PUSHMATIC ITE Bulldog 2 Pole 40 Amp BREAKER - P240 - eBay (item 310187846410 end time Jan-09-10 08:51:47 PST)

This is a 40.

They are also called BULL Dog Breakers
Make sure you email the eBay seller and confirm the size since you want to make sure of what you are getting

Here is a list of them

bull dog breakers, great deals on Home Garden, Business Industrial on eBay!

You can also try Google and your local electrical contractor. They might have some laying around the shop at a cheap price. Also make sure they are a bolt in like the ones posted. Good luck.