That sound like you are cycling on the high limit switch.....
Runs fine on bench but on/off when installed...air blowing back
You need to make sure combustion/exhaust chamber is free, clean & clear of any obstructions. Overheating in combustion chamber due to inadequate air flow thru it and high limit switch opens shutting down burner.
High limit switch is in same circuit as sail switch....so when you jumpered the sail switch the high limit switch was still in the circuit going to control board
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31