Girard Tankless Water Heater III - Error E7
Hey folks. TLDR: Getting an E7 error code on our tankless water heater, except sometimes it's an E1 code and sometimes it's an E2 code. What's the problem and how do we fix it? We've been using our ...
Forum Discussion
Update on my repair attempts.
According to the Service Manual, the E7 code indicates a problem with the gas valve.
I purchased a new gas valve for $110 and used the service manual to replace the part. It wasn't complicated, but some rusted screws made it more difficult than it should have been. Once I had everything put together again, we ran the water heater and got the E7 code again. We turned it off and on again and fiddled with the wires and double-checked everything and still, it continued to throw E7 with the new part in it.
I went off and kicked a few things and swore and complained, and then I called Lippert Customer Service for technical assistance. The tech had me use a multimeter on the continuity setting to test the continuity of the wires leading from the part to the control board. My multimeter gave me a reading of 80ohms and the tech said that meant the control board was bad and needed to be replaced.
Now I'm kicking myself, thinking I should have tested that first and saved myself the money and trouble of replacing the wrong part. A new control board is $150, and if this doesn't work then the tech says the only thing to do is buy a new water heater for $450.
I will say that I was very pleasantly surprised by how knowledgeable and helpful the techs from Lippert Customer Service were. I should have called sooner.
