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Best to go to Rheem website and download the right wiring diagram. You don't want to take a chance and damage something else.

Rheem... | Answered on Mar 05, 2019

Try raising water temp. It may be set to low and you will not get a full 50gallons of hot water.

Rheem Water... | Answered on Mar 02, 2019

bad pc board?
inadequate maintenance?
bad oxygen sensor?
inadequate air supply?
bad venting?


If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Rheem Paloma ... | Answered on Feb 23, 2019

Just how much did you investigate this on the internet before asking here? I Googled " Rheem C2 tankless water heater" and found http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html. Look under Error Codes. Code 11 refer to gas supply/ignition. If you don't know much about tankles water heaters or gas ignition, call a Rheem Tech.

Rheem Water... | Answered on Feb 23, 2019

It was to hot, if it's still hot take a shower to help cool it down faster before you have an accident, cheaper to waste a lil water than pay for a hot water tank or worse, a hole in your house. You said you turned it down, leave it where you have it, if it's cold out or if it's the first shower of the day sometime the water is just colder, but you will notice if you would have gotten a shower and let it warm back up you might have had hotter water, I don't think it would have gotten that hot on one element especially in a hr.

Rheem Water... | Answered on Feb 10, 2019

According to the literature I read, this heater requires a DEDICATED 240 volt, 60 amp service minimum. That means it should have its own circuit breaker with nothing else on that line. Depending on the overall electric service size for the building, the heater is causing an overload when it's on and resulting in a voltage drop that causes the flickering and possibly other issues.

You didn't say if this was a residential installation but if it is, most homes have a 100 amp 240 volt service (in the USA). The heater is using most of the home's power. If there are other loads on the service like an electric range or oven, the problem will be worse.

If the home is new, it may be equipped with a 240 volt, 200 amp service. If that's the case, the heater should be checkd with an ammeter to be sure it is not over-drawing for some reason like under sized wiring, bad connections or contaminated heating electrodes.

Rheem RTE 27... | Answered on Jan 31, 2019

Have 2 of these Rheem units in my house. Both had this same error code within 30 days of each other. And my neighbor has 2 units as well - and guess what - 2 months after mine stopped working because of the code - so did theirs. It is not something that can be fixed. It is a manufacturer's defect - and it looks like Rheem has yet another class action on their hands (like the one for the RTG - 74 PVN). They need to do a recall to repace these units.

Rheem... | Answered on Jan 31, 2019

tank water heater? if so its because the water is much colder this time of year. water heater has to work harder to heat 40deg. water than 70deg. water in the summer. That also means as you use the hot water from the tank its replaced with very cold water. Causing you to have less hot water. Either get a larger water heater. Or even better go tankless and have never ending hot water and save money at the same time.

Rheem 50 GAL FVR... | Answered on Jan 24, 2019

I suggest you check the owner's instruction manual but it would be rare for any water heater to have a facility for reset - if they are ok they heat the water to the preset temperature and maintain that temperature and if they don't it is because there is a fault that, for safety reasons, should be rectified.

Rheem Water... | Answered on Jan 19, 2019

Troubleshooting Tankless Water Heaters In MINUTES Step By Step
The above video will show in detail how to solve the problem. It sounds like you need a new flow sensor.

Rheem Water... | Answered on Jan 03, 2019

the inlets should be color coded and also stamped in to top. with controls facing you the cold is on the right.

Rheem Water... | Answered on Nov 19, 2018

Do any other digits appear when you look at the LCD panel? Most Rheem Tankless water heaters will have a two-digit number in addition to the C2 code. Some of the error codes may be in your water heater manual. http://www.tanklesshotwaterguide.ca/about/rheem-error-codes-tankless-systems/ has some of these listed.

For example: C2 11 indicates a failure to light the gas burner (for gas/propane) units. This could be do to a shut-off valve that wasn't completely open. There could also be air in the gas line or insufficient pressure. There might also be a problem with the ignition/wiring.
A C2 00 code indicates that the burner was on for more than 60 minutes. For this code, turn off all open hot water faucets, including a dishwasher or clothes washer. Turn off the water heater. Turn off or remove recirculation pumps. Wait an hour for the unit to cool and reset the error code. Try the unit again.

Please add a comment with the full error code and the model number of the water heater for additional information.

I hope this helps.

Cindy Wells

Rheem Water... | Answered on Nov 15, 2018

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