Question about Rheem RTG-66DVN Direct Vent Natural Gas
I continue to get an error code 11 in the digital temp setting display. I was on the phone with customer tech support several times yesterday- Inlet Gas = 7" w.c.; gas supply lines are 3/4" (24" of flex); shutoffs are all fully open; GFCI outlet grounded properly; 3"x5" Rheem concentric venting system. This is a RGV-66DVN unit. Any suggestions?
I was having the same problem untill I reallized it was my venting system. Test the water heater with no vent on top. Disconnect the vent pipe from the water heater and try turning on the hot water. the water heater needs a special adapter to vent the direct vent water heater. One other thing you can check is the gas pressure in your home. You have to have between 7 and 8 WC (water Column) for the tankless water heaters. You can call your gas supplier to find out what you have.
Posted on Jul 04, 2009
I had the same code 11 with my Richmond tankless hot water heater.
The problem was with exhaust gasses getting sucked back into the intake tube. This robbed the combustion chamber of oxygen causing it to shut down. A simple adjustment to make sure those gasses could not mix at the intake/exhaust port fixed it.
Posted on Oct 25, 2009
Do you have enough gas comming from the meter, just because the size is right doesn't meen the volume is there, you need to have 2lbs of gas going into the unit, the vent must be installed properly and locked together at each connection and out side the vent can not have anything in fornt of it to where the cold air intake wold pull the exhaust fumes back in when it is fired up, if it detects the burnt gas it will go into default and shut down because of the carbon minoxide comming thru the fresh air return good luck
Posted on Jun 06, 2009
Had code 11 called rheem and they told me to toke the clear rubber hose that has an inner hose off the regulator thingy on the right hand side of the unit, look for any traces of water if there is even a misting of water push and hold the max butten on the circiut board while tube is disconneced and straightend towards the floor after several attempts i finnally got a hair dryer and got all of it out it now works fine. as for customer service i hgive them a a+
Posted on Feb 28, 2013
My error 11 was condensation inside the unit. Turn the gas off, unplug, take off the front cover, and let it dry (use a fan). Reverse everything.
Posted on Jul 22, 2019
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