Richmond Tankless Water Heater Ignition Problem?
by Bob C
(New Lenox, IL)
The Richmond RMTG-74PV unit has been working fine since installation(July 2009) until a few months ago. It still functions, however if its been running for any period of time and the hot water is turned off, it fails to re-ignite unless we leave it alone for several minutes.
The error codes are flashing C2 and/or C11. I don't believe the problem is poor plumbing/water intake or gas pressure (its been fine for almost 2 years and nothing has changed). I've cleaned the air intake and cold water filters every couple months. I took the cover off to look around and the only visible fuse appears to be fine.