20 Most Recent Rheem EcoSense by 7.4 GPM Outdoor Tankless Water Heater Natural Gas Questions & Answers

11 The Gas Shutoff Valve is not opened
completely.

12 Gas Service has been interrupted.
LP Gas is running low. (LP models only)

I think C7 is where the startup sequence ended...and then you get the error code

If less than a month old...contact your customer support

1/2 inch if you are using steel pipe (which is the most hearty for outdoor installations).

Happy installation:)

that is a no ignition code need to have a qualified technician check it out

black and white

hi do you have 3/4 inch cas line running to it? if you only have 1/2 inch it is too small and running out of gas and shutting down. ed

overheat stat or fan

gas pressure may be increased but most boilers are designed to a limited output 24 28 30 etc

heres the link for that water heater from Rheem
http://www.rheemtankless.com/content/resources/documents/tankless/ErrorcodeTroubleshooting.pdf
click on this and it should help in the trouble shooting of your problem.

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 ... ..

The burner cover plate for your Rheem RRNL-B030JK08E unit can be obtained from an authorized Rheem dealer or distributor. You can visit the Rheem website to locate a dealer or distributor in your area. Alternatively, you can contact Rheem customer service for assistance in obtaining the burner cover plate. Be sure to have the model and serial number of your unit available when contacting Rheem customer service.

this from Rheem error codes Error Code 60 FAULT = Hot Water Temperature Abnormality

1. Press the Power button to clear the Error Code. If Error happens again:
2. Ensure water heater inlet and outlets are open and water is supplied to the water heater.
3. If Error happens again:
4. Ensure water heater inlet and outlets are open and water is supplied to the water heater.
5. Check the pump operation.
6. If it doesn't work, ensure wiring connections to pump.
7. If even supply power to pump and doesn't run it, replace the pump.
8. If Error happens again:
9. Verify recirculation loop length is within specification. Air purge is not enough.
10. Too much restriction on recirculation loop.
11. Return loops are clogged.
12. Check the recirculation loop condition.

https://parts.rheem.com/contactus .

Hi, From what I'm seeing this means that there is a bad part within your furnace and it needs to be replaced. It might be the thermostat. You might need to reach out to a local HVAC company to diagnose the issue in person. Thank you.