Flame Rod Shorted. Honeywell Maxon 27729 Flame Rod for OVENPAK 400 Series Burners Flame sensors fail when: They short out due to a cracked insulator. That bridging process thru the flame converts AC to DC and the flame rod then becomes shorted to ground.
Flame rod GFR3 WIKA Australia from www.wika.com.au
Delta T inlet/outlet high: Temperature rise between supply and return is too high We have an older (1989ish) Lennox NG furnace model G16RQ3-50-7 with a Honeywell S8670K Continuous Retry Controller (?) that's sending out a LED flash code of "7" (flame rod shorted)
Flame rod GFR3 WIKA Australia
I cleaned the ignitor and re-installed the assembly and everything worked fine, for 2 days Once the board sends 24vac to the gas valve to open, it monitors current flow on the flame sensing rod. A scratched-up flame rod should be considered damaged, and it should be replaced
Honeywell Maxon 27729 Flame Rod for OVENPAK 400 Series Burners. Flame rod shorted to ground: Flame rod shorted to ground: Shorted or mis-wired flame rode wiring Other than that, the furnace is operating as it should
Kanthal WFR212K Flame Rod Industrial & Scientific. Problem changed, inducer on,flame on 3to4 seconds than flame and reducer off The AC voltage comes out of the control box on the flame sense line