I have a Weil McLain 97+ 110 gas boiler that has been working well for the past couple years after we installed it. This morning I got a call from my wife that we lost heat. It was windy out and I figured that may have tripped an auto shut-off if it pushed against the exhaust too much. I would get home from work and just have to reset it.
Returning from work I checked that the exhaust/ intake was clear and made my way to the basement. No breakers were tripped but the display was completely blank and void of any colors (vs red/purple/blue/ other warning colors with the display). I flipped the on/off switch to try to reset the boiler without effect. I verified the wire directly connected to the boiler was in fact live. I turned off the power to the boiler, removed the cover and traced all the lines making sure they were all connected (including unplugging and plugging them in). Yet again when everything was replaced and power was turned on, the display remained completely blank and the boiler pretended it was not receiving any power source. I again turned off the power supply and proceeded to remove the main display to check the fuses (low voltage 3 amp fast-blow and line voltage 12-amp slow-blow) which both seemed to be in fine shape visually. I checked all the connections again and reattached the main display with the same disappointing results.
I admittedly do not have a multimeter to test the fuses and am hoping they still may be the problem despite looking fine. Beyond that I can't imagine the display somehow going bad within a few years.
I've been racking my brain on anything else I can troubleshoot but haven't been able to come up with anything else. Just looking for anything I may have missed.
Returning from work I checked that the exhaust/ intake was clear and made my way to the basement. No breakers were tripped but the display was completely blank and void of any colors (vs red/purple/blue/ other warning colors with the display). I flipped the on/off switch to try to reset the boiler without effect. I verified the wire directly connected to the boiler was in fact live. I turned off the power to the boiler, removed the cover and traced all the lines making sure they were all connected (including unplugging and plugging them in). Yet again when everything was replaced and power was turned on, the display remained completely blank and the boiler pretended it was not receiving any power source. I again turned off the power supply and proceeded to remove the main display to check the fuses (low voltage 3 amp fast-blow and line voltage 12-amp slow-blow) which both seemed to be in fine shape visually. I checked all the connections again and reattached the main display with the same disappointing results.
I admittedly do not have a multimeter to test the fuses and am hoping they still may be the problem despite looking fine. Beyond that I can't imagine the display somehow going bad within a few years.
I've been racking my brain on anything else I can troubleshoot but haven't been able to come up with anything else. Just looking for anything I may have missed.
