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do you have a circuit board in the blower section that has a blinking light?
based on short blinks first and long blinks next...what is the light flashing?
On the front wall behind the gas valve is a credit card sized flat plate with 2 wires attached...do you see this ?
how many roll outs do you have and did you press the center buttons or jump out the roll outs?
That is computer generated...I cannot call.
Did you check this vent switch shown here
I need to eliminate some things so please answer each point.
Did you press the vent reset that I sent picture of?
Did you press button on all roll outs around burner?
Was the filter plugged?
did follow the wires switch to switch?..they are all in series...so you can follow wires all the way to circuit board.
You have a "limit loop" where one wire leaves circuit board and stops at all the limits and then returns to board.
If the limit loop shows no opens at all it is a circuit board.
Can you post a pic of the furnace with door off so I can see if you have a fusible link?
do you have a fusible link?
so you do not have this in the limit wire?
if you have checked all the limits and verified 24v is getting back to board and you still have 33/13, then it is a circuit board issue.....BUT this is based on 24v getting all the way through the circuit
Your furnace has two limit circuits that must be closed .If either one is open we will get the error code.
To troubleshoot you will need to check for continuity between the 2 red wires as shown below and then between the orange and yellow.
To check, unplug the 9 pin plug and check at the plug with wires attached(Make sure wires are seated in plug so they make contact when plugged onto board.
If you find we do not have continuity, check each limit in circuit by checking continuity at each limit .
If you find one open replace that limit.
If we have continuity between the yellow and orange and between the two reds and wires are making good connection at board, replace the board as it is failing to read the closed circuit.
OK the code 33 indicates a limit had opened.
If it is an auto reset it will reset after it cools down.Turning power off and back on resets board.
If pushing on board made it some on.I suspect the board has developed what is known as a stress crack,Board is most likely the issue here.
Make sure the wires are connected good to board and any connections such as wire nuts where wires connect from thermostat
Did you try wiggling the wires at board this morning to see if it will come on?
Sorry for the delay.I got called out of the office.
To see if thermostat is issue,Connect red and white R and W on board, but that would not explain the error code.You either have a limit opening or a bad board to get that error.
Excellent.I knew we had a problem with board sensing the limit to be closed.Glad you found that wire.Let me know if it totally solves issue. Good work.