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Can you give me complete model from inside furnace in burner compartment so I can provide guidance with this specific unit.Model will be on a label just above burners on right or left inside panel
Then look in blower compartment and see if we have a control board with a blinking light.If so tell me the pattern of that flash.That will indicate what is wrong and tell us where to start troubleshooting.
4 blinks is an open limit error.You may just have a bad limit from factory. Do you know where main limit is?
Main limit looks like this
For a test, let's unplug wires to limit and connect the wires together ,bypassing limit, and see if furnace will work.
If it does, just replace the limit.If not we will go from here.
Did error code go away?
Follow those wires that go to limit and locate every limit in unit doing same thing until you find one that makes the error go away and furnace work.You may have 4 or five
1. There should be one wire coming from board going to first limit, out of limit to next limit,out of that one to next until it goes through all limits, then it goes back to board telling board the circuit is closed so unit can work.If any limit in circuit is open the circuit is broke and we get open limit error.
2. Trap should have water but has nothing to do with a limit error.If drain were an issue we would have a pressure switch error not limit.
Wish we could et it going.If you are getting an pen limit code one of the limits should be pen.Make sure all wires are connected good.Unplug connector n board and make sure al wires are seated and making connection when plugged in.If so an onsite tech is going to be necessary.Should be covered under warranty.
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I can not tell you to bypass and leave due to liability reasons.Not unusual to have a bad part although new as most of these parts come from China or Mexico.
Yes the limit only tells it to shut off if chamber overheats.As long as chamber is not getting too hot, everything is fine.If furnace had been running I would be concerned but since furnace was cold, we pretty well know limit is the problem.
I just can not tell you ever that it is ok to bypass a safety