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Weil-Mclain Ultra 3 blows 3 amp and Limit Open error
I have a Weil-Mclain Ultra 3. I moved in less than a month ago. The house was on an old Federal Pacific Panel. An electrician swapped out and rewired the panel with a Murray. He surged the house. New electrician installed a home surge protecter on the panel. The Ultra 3 has not worked properly since the surge. It keeps blowing the 3 amp. No-one has been able to help us in over 2 weeks now. Troubleshooting on our own, we find that if we turn off the T-stat that the boiler will display on, but we are in lockout mode - Limit Open. The manual says check the jumper on the orange pins. It's set to 3&4. It also says check wiring for external safety device. Could that be the home surge protector? Before we got the protector we never got that error. We would simply have the boiler on for a few minutes to a few hours before it blew the fuse. the control module has been replaced. When t-stat is on - it blows 3 amp. When t-stat is off, it doesn't blow but we get limit open error.
Thanks for any reply. We have had freezing nights here with the children and would just like some heat and hot water.