Nope. Combustion Chamber insulation failure. Looked in through the sight window and looked like there was a board leaning against it. Knew exactly what it was. On order now. No one has it local and they'd have to order it just like me.
Hope not to much damage happens before it arrives.
I'm sure the furnace being underwater for a few days had nothing to do with it. 😠
Well today was furnace day, X2. I had my new furnace delivered to the shop for the sprayroom. Just had to off load it from the truck and put it into the shop. Lots more work coming to get it installed, mostly the ducting. Easy Peasy, well for today.
Next furnace job is at home. Need to replace the combustion chamber insulation. I have a Slant-Fin L30 furnace that needed the Lynn 1087 kit. This issue happened most likely because of the flood in the basement that was 18" deep covering the combustion chamber completely.
Last few days I've been putting penetrating oil on the 4 nuts that hold the combustion chamber hatch on. Worked great. Nuts came off no problem with a ratchet wrench. Had to disconnect the oil line and the electric to the flame sensor box. Did that after I shut it down to cool off.
Got the hatch off and oh ya nice. Nearly half full of soot and insulation.
The front hatch wasn't that bad. Insulation was mostly intact and in fair condition.
Round one of cleaning I filled up this pot, think it's 10qts. Round 2 filled it up again.
After scraping, wire brushing and vacuuming it was pretty clean
So now it's clean and it's time to start putting it back together. The front hatch insulation needed to be fit a bit. One of the corners had to tight of a radius and I sanded it to fit and the hole wasn't center around the burner and had to be sanded too. Went it good after that. Filled in the opening with the floor insulation.
Then the target wall needed to be fit a small bit. Little sanding and a few shims got it in there tight.
And then the floor is a blanket. Had to cut it to size and then pour Water Glass on the bottom which is a high temperature glue. Then set the blanket into the Water Glass making sure the blanket overlaps the target wall insulation.
Last thing to do is to put the gasket material into the groove on the hatch. It's like a putty rope. They gave me four lengths and I used 1 1/2 to complete the seal.
Put the hatch back on, and torqued the four nuts til the gasket material squeezed out and went metal to metal. Then hooked up the oil and the electrical. Turned the oil back on at the tank and flipped the electrical switch on.
Normally it takes 2 seconds for flame, took 4 second first fire up. Stayed true and steady. Working great.