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The rollout switch(es) (see attache pic) are also in the limit circuit. You can try resetting them by pushing the small button between the 2 wires. If it clicks you have reset it. If it doesn't click it wasn't tripped. They are located just outside the burner chamber.
The same answer still applies
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It will have 2 wires attached. They will be just outside where the burners are.
If you still can't find them then post a pic here of the burner area and I'll point them out to you
Yes, if it doesn't click when you push the small tan button between the wires then follow both of those yellow wires to see if there are more than 1.
Then try this, turn the power off and connect the 2 wires attached to the switch together then turn the power back on. If the unit fires up then replace that rollout switch. Do not operate the furnace with the switch bypassed this is for testing purposes only
You can usually insert a small piece of wire into the spade connector once you pull it off the switch. A paperclip can also work. Don't cut the connectors off unless you have more and a crimping tool to replace them. Don't let the paperclip or other bare wire you use to connect touch anything.
Yes if that white wire has bare copper ends and fits tight into the connectors. If so then turn the power on and see if the error goes away and does the burner fire up? If that's a paper clip it won't work with a painted clip. It has to be a bare metal clip.
Ok, if you have good contact in the connectors (bare wire tight fit) then the next step is to check for continuity along the yellow wire circuit. You'll need a multi-meter to do this. You can also check all the connection along that yellow wire from end to end (where it connects to the control board).
You should do this with the power off. If you do have a meter then check continuity where both ends of that (yellow wire) circuit connect to the control board. If you have continuity then the board is suspect. If you don't then you have to trace along that yellow wire and test every device you find for continuity and a good connection.
You need to set the meter to OHMS. If you have continuity then the meter will read a very low (probably single digit) number. If there is a break in the circuit due to a bad connection or a bad device then it will read infinity or OPEN CIRCUIT. If you read a low number then the board is suspect.
Just answered that. Be sure the power is off to the furnace.
Doesn't matter but but the lowest setting is probably best. I guess that snake is the omega symbol which is the symbol for ohms.
Once you set it touch the probes together. You should get a 0 or close to it reading. The reading with the probes apart is open circuit or infinity.
you need to probe where they connect to the control board.
The main control board where you're seeing the blinking LED
Do you know what he did to get it running?
That doesn't sync with what you were telling me. A loose fuse means no 24 volt power so no LED flashes and no furnace start up. What ever the actual culprit I'm glad you have it running now.