A little less than 2 years ago we had a Lochinvar knight KB106 installed in our home to replace an old original boiler with 4 zones (installed in a large 5 ft crawl with its own loop as well). The zones are all set up and the crawl space loop kicks on anytime one of the 4 zones calls for heat.
We love boiler heat, and when working loved the lochinvar boiler. Since it was first installed, I've had the same issue. TEMP DIFF red screen pops up on the boiler and it shuts down, shutting down our heat until I go down there and click the 'reset' button. We live in Michigan, and can not even leave the State during the winter without someone going to the house to make sure the boiler isn't locked out. My installer came back 2 times to fix it, then just stopped returning my calls. I looked up Lochinvar site for a recommended contractor, I picked the one with all the 'credentials' and they came out. He said there needed to be a backflow preventer value installed, 6 inches between 2 pipes (at a "T" on the boiler, not sure the name for them) and flipped by boiler pump and my system pump putting the stronger pump of the 2 (it has 3 speed options) on the system side and the weaker pump for the boiler loop end. That Tech left and said "she's all fixed, you'll never need to get anyone out here again"... 12 hours later, same screen. Lockout. Temp Diff. Since the last contractor came out, I now get a 2nd lockout screen. OUTLET ARHL. I've attached both pictures. This system has been a nightmare and I'm just looking for any type of guidance. I can attach all kinds of pictures. I really appreciate any help that can be provided as we are running out of options it feels like.
Thanks!
We love boiler heat, and when working loved the lochinvar boiler. Since it was first installed, I've had the same issue. TEMP DIFF red screen pops up on the boiler and it shuts down, shutting down our heat until I go down there and click the 'reset' button. We live in Michigan, and can not even leave the State during the winter without someone going to the house to make sure the boiler isn't locked out. My installer came back 2 times to fix it, then just stopped returning my calls. I looked up Lochinvar site for a recommended contractor, I picked the one with all the 'credentials' and they came out. He said there needed to be a backflow preventer value installed, 6 inches between 2 pipes (at a "T" on the boiler, not sure the name for them) and flipped by boiler pump and my system pump putting the stronger pump of the 2 (it has 3 speed options) on the system side and the weaker pump for the boiler loop end. That Tech left and said "she's all fixed, you'll never need to get anyone out here again"... 12 hours later, same screen. Lockout. Temp Diff. Since the last contractor came out, I now get a 2nd lockout screen. OUTLET ARHL. I've attached both pictures. This system has been a nightmare and I'm just looking for any type of guidance. I can attach all kinds of pictures. I really appreciate any help that can be provided as we are running out of options it feels like.
Thanks!