Rheem RTG-66DVN Direct Vent Natural Gas - Answered Questions & Fixed issues

The OHL is not for sale due to a couple of reasons. If the heat exchanger has a hot spot it will melt the OHL making it useless. The OHL is just a large fuse. Rheem will completely warranty (if within date range) if the OHL or heat exchanger has problems. Bypassing the OHL is very dangerous and could result in a house fire since the appliance is mounted to a wall. I would suggest scrapping the copper heat exchanger for cash. That about all its worth in the condition its in.

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.

Error 11 is ignition failure, or insufficient gas, or defective sensor, dirty combustion parts.Do the yearly required maintenance such as cleaning the combustion parts, and error code will probably be solved.Problem is Rheem does not post service manuals for people to learn how to service their equipment without calling service tech.Copy following link for Rheem troubleshoot resourceshttp://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.htmlThe cost of yearly maintenance will easily eat away the expected yearly savings of $100 for typical family of 4. If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1 clean flame sensor
2 clean burner YouTube video
3 clean heat exchanger
Start with 1,ect
Rheem website has instructions or call they will e-mail info.

Troubleshoot and error codes following link: http://waterheatertimer.org/pdf/RTG-error-codes-3.pdf Not getting gas, low gas pressure, air in gas line, igniter not aligned with burner, wires disconnected, unit not grounded ... If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#error Catch up on maintenance, call service tech.. Gene Water Heater Timers Save Money If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#error Gene Water Heater Timers Save Money If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Water Bypass Valve malfunction. Hot outlet water temperature is above or below set point on Remote Control. but 99% of the time it is the PCB Board, you will have to contact rheem they may send you a new circuit board.

Absolute danger here:1) Call gas company IMMEDIATELY to check for gas leak that can cause explosion and fire.2) Call plumber immediately to fix improper combustion or improper vent before toxic combustion by-product kills family.Gas appliances must vent toxic by-product outside and away from home where the gasses will kill the planet instead of you. If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Add a comment and include brand, model, type and approx age of water heater for possible help.http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.htmlhttp://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Call Rheem
1-800-432-8373

Open following link for troubleshooting resources, including Rheem chat, possible manual, and general maintenance pdf:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Before calling service tech, open following links for Rheem troubleshoot resources including rheem chat, error codes, possible maintenance and service manual.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are considered start-point for troubleshooting.
Multiple error codes can mean PC board failure.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/pdf/Error-code-13.pdf
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Before calling service technician, open following link for error codes, Rheem chat, and possible manual:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf

Error codes are considered start-point for troubleshooting.
Error 11 is 'no ignition'
Without ignition, the burner will not turn on and heat water.

This problem can be caused by low gas pressure, air in gas line, defective tankless parts such as gas solenoid, loose electrical connections, improper electrical grounding, bad igniter, etc.
Problem can also be caused by combination of problems.
Good news is that error code shows 1 code and not multiple error codes that can indicate larger failure including PC board.

Each tankless instruction manual recommends yearly maintenance where technician will clean burner parts, bleed gas line, check gas pressure, check air and venting, etc.
Yearly service covers the cause for most common error codes.

I got a new Rheem heater and it's complete garbage. No water pressure.

recently installed?

Brian sounds like it's Leaking From Anode rod.... Check here.... https://lildutchuncle.com/rheem-water-heater-leaking/

The three most common reasons for this happening to you are 1) a defective gas valve, 2) a rusty thermopile, and/or 3) the automatic shut-off not working as it should. So, the most common reason for many people having this problem stems from having a gas valve that is not working as it should. When your gas control valve is faulty, it will mean that your burner is not going to be igniting as it should-or at all. Something that worked for me one time was to turn the Temp all the way down then all the way to Max a couple of times..gradually. Why it worked I don't know. Got a couple more years out of it though. Good luck! Best to you.

there is pressure adjustment, just temp. water pressure in + water pressure out

I don't know for sure but look at page 117.... http://snowcrest.net/thriftysupply/pdf/RTG-Service-Manual-REV-2.pdf

Rheem furnace error code 68 is a mechanical relay system which signals the blower motor to stop because it has not received a signal from the thermocouple. Jul 20, 2022

Rheem furnace error code 68 - HVAC Contractors

Motor Power And Communications Issues (Fault Code "68")

ManualsLib https://www.manualslib.com > Rheem-96v-Series Motor Power And Communications Issues (Fault Code "68"); Line Voltage And Low Voltage Connections To The Communicating Motor - Illustrations - Rheem 96V Series ... ..