Munchkin F09

Jim Pompetti

Going to Heat Transfer Products.com You will find the info you need .

David Toppin_2

Munchkin F09

Good evening everyone. I have a Munchkin throwing the F09 code. I have cleaned the spark ignitor and the flame probe, and the spark does spark and I do get a flame, but it goes out very quickly. I have been getting it intermittently over the winter but I can always get it to restart. I think it may be restarting itself without me noticing also. Yesterday I took it apart and cleaned the coils with CLR. I'm kind of thinking the condensate drain may be clogged, for lack of better ideas. My question now is where does the condensate come from? Inside the coils? I can't find a place the water would drain out. Will I be able to find the drain from the inside? If I pour water inside the coils will it drain out the condensate tube?
Thanks in advance for your insights, it is greatly appreciated. Dave

David Toppin_2

HTP

I've read all their stuff AND talked to their tech support this AM. I still have some questions but I can only talk to them 9 to 5. I do understand better where the condensate comes from.. Thanks Dave

canine

F09

got to love that vague code. I had a system that had that problem and changed everything out to try to fix it. Then got a individual from heat transfer to come out and look at it and it turned out to be the wiring harness.

David Toppin_2

Thanks for the input. THe boiler is running, but I don't know exactly what I fixed. I did wiggle some of the wires and they did look a bit corroded. I have a concentric vent, and I think the exhaust comes back in the intake and causes a bit of corrosion. One guy who I got a blower fan from told me the concentric vents cause the blower to go. I can't believe they won't sell the $2 part to fix the blower. Have they changed the design on that yet? I lost that one Christmas eve, made for a cold Christmas

David Toppin_2

D7

My reading is .8 and I was told by HTP this am it should be 3.8 to 4.1. I read somewhere that that indicates a faulty flame probe rectifier. Anyone have any inpu ton that? Thanks Dave

Ted_9

.8

If your flame rectification is .8, I'd look at your combustion levels.

After you clean the heat exchanger with CLR, did you rinse with water?

Check the burner. Is it clogged?

Also if this has a Dungs gas valve, look at the swirl plate for signs of deterioration.

tim smith

If condensate not backing up, try this

Pull faceplate with burner. Remove burner from faceplate. Clean flange of burner that mounts to studs on faceplate w/ light sandpaper,both sides. Then clean faces of nuts that it mounts with and then remount burner w/ new gasket as old will probably be worn out. Reassembled and make sure no flue gas leaks on faceplate. This will clean up ground path from inside combustion chamber out to the outer ground connection. Studs are only path of ground for flame signal. Good luck.

David Toppin_2

.8

Yes, I did rinse with water well. I don't believe the burner is clogged, but there is a bit of a rattle in it. I blew it out with compressed air. HTP says look at the combustion levels at this point. I think I have a honeywell valve...

David Toppin_2

burner ground

Tim,

I had read that somewhere before, but I didn't have a gasket on hand so I didn't want to pull the burner tube. I did use a ground wire from the screw on the rectifier to the bolt coming out of the boiler and that didn't seem to help. Does that mean I can rule out the ground problem or am I missing the point. thanks to everyone for their help... Dave

Ted_9

Ground

Do not put the ground wire to the flame probe. The ground only goes to the spark electrode.

Ted_9

Combustion

Getting combustion numbers is alway a good thing.

tim smith

You need to clean the burner flange & nuts

The wire you ran will not take care of flame ground... Tim