20 Most Recent Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm Questions & Answers

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Control panel UMC-117 stuck at 50 degrees Fahrenheit does not go up?

Posted to the category Cars and Trucks but appears to be heating. All questions need FULL 'make model (what it is)' as first 3 words. Contact Rheem direct and claim a warranty replacement of the thermostat or free service advice. Did you try a power reset? https://www.google.com/search?q=UMC-117 ..
4/5/2023 3:08:00 PM • Rheem Tankless... • Answered on Apr 05, 2023
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Rheem water heater rtg95dvn keeps blowing 3 amp fuses

Not for sure what your root cause was and I know it's a little late but I just suffered this same exact scenario on the same water heater. Storms came through, power went out, power came back on and the water heater keeps blowing the 3 amp fuses now. I removed all the cables and plugged them back in one at a time. When I plugged in the Fan Motor connector the fuses blew. Installed new fuses with the connector out, the Fan Motor was putting out 150 VDC through the connector port (on main control). I pulled the control from the unit and Q1 is visible blown and disintegrated on the control board. Obvious control design issue. I've ordered a new control and will put a surge protector on the heater now when the new control comes in. Very disappointed that this was not caught in controls testing within the manufacturers facility. New control is not very cheap. Half the cost of a new Heater. Hopefully the Fan Motor survived the high voltage with the fuses blowing. I'm putting this here for anyone else that suffers the same issue on this water heater or the Richmond equivalents as they use the same control. rheem-water-heater-rtg95dvn-keeps-lig2cnfgd44b3pejpipwueov-2-0.jpg
11/1/2020 6:16:06 AM • Rheem Tankless... • Answered on Nov 01, 2020
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I am needing a Power Star Model 45-551301 owners manual can anyone help me find one??

Look here: http://uahmfvx.bestforum4u.com/t70-Powerstar-45-551301-manual.htm
10/9/2018 1:42:23 AM • Rheem Tankless... • Answered on Oct 09, 2018
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How to instal tankless hot water

Open following link for installing tankless electric water heater:http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
10/8/2018 11:26:00 PM • Rheem Tankless... • Answered on Oct 08, 2018
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Which circulating pumps works on tankless water heaters

Laing UCT-909-TANKLESS UltraCirc Tankless Water Recirculating Pump

This is designed to maintain the proper flow to fire the heater. Please be sure the pressure in the house is at least 5 psi over the minimum required for your unit.
9/4/2018 1:55:19 PM • Rheem Tankless... • Answered on Sep 04, 2018
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My Rheem Tankless Hot Water Heater is installed, but is it not attempting to start. The digital display keeps blinking 82, 0, 82 , 0 ...?

If this is a new board and Altidude chip with power on set dip switch 1 and 2 to on. Then press and hold adjust button until on board blinks fast then and you will see dashes on LCD display. Set dip switches 1 and 2 back to off. Turn on remote unit and you should see 100F. With any luck you are good to go.
5/1/2018 12:59:13 PM • Rheem Tankless... • Answered on May 01, 2018
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No warm water from Rheem tankless

Might be bad single-handle faucet cartridge: http://waterheatertimer.org/Crossover.html http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
10/29/2017 7:30:05 AM • Rheem Tankless... • Answered on Oct 29, 2017
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Rheem RTG-64DVN model, brand new

contact your gas company if the error code is "12," indicating that the gas supply was interrupted.

have a good day !! In LP models, the 12 error code may also appear if the LP gas supply has gotten low. To clear the code, replace or refill the LP gas supply.

go here for a list of codes for rheem tankless water heaters-- www.ehow.com/list_7833182_error-rheem-gas-water-heater.html
5/18/2017 12:00:54 AM • Rheem Tankless... • Answered on May 18, 2017
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I have a rheem pronto rtg-74dvn-1 tankless water

Hi yes it is the oxygen sensor but I cannot find where it is . looked on the rheem site . There is no picture of what it looks like.
5/8/2017 2:04:20 PM • Rheem Tankless... • Answered on May 08, 2017
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Unit won't operate and there are 4 flashes on the red light.

Two things- Clean the sensor rods or replace(cheap and easy with YouTube instruction video) and at the same time replace the main program chip (also a easy plug in chip). The whole repair takes two hours for a homeowner and costs about 50 bucks for a chip. These are easy an generally the flame sensor rod is the culprit. The code may also be the limit switch but try EZ and cheap first. See You Tube.. https://www.youtube.com/watch?v=npxcVo7RK2c
10/23/2016 3:54:41 PM • Rheem Tankless... • Answered on Oct 23, 2016
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Took cover off control panel of Rheem RTG-74PVP tankless hot water heater. A red light blinks 4 times. What does that indicate is wrong?

Two things- Clean the sensor rods or replace(cheap and easy with YouTube instruction video) and at the same time replace the main program chip (also a easy plug in chip). The whole repair takes two hours for a homeowner and costs about 50 bucks for a chip. These are easy and generally the flame sensor rod is the culprit. The code may also be the limit switch but try EZ and cheap first. See You Tube.. https://www.youtube.com/watch?v=npxcVo7RK2c
2/28/2015 3:00:45 PM • Rheem Tankless... • Answered on Feb 28, 2015
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I went to take a shower this morning and the water was ice cold. For more than twenty minutes the water ran and never warmed up. Are there common things to check my hot water heater for in this situ

There is an adjustment knob to control how hot the water can become. There might be a problem at the tap (however, if this is the case, you would still get hot water everywhere in the house). If the entire house isn't getting hot water, and the knob is set at the hottest water, you probably need to get the hot water tank replaced.
2/4/2015 6:54:46 PM • Rheem Tankless... • Answered on Feb 04, 2015
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Hi , i got a code 13 can get rid of it , cleaned vent

Two things- Clean the sensor rods or replace(cheap and easy with YouTube instruction video) and at the same time replace the mail program chip( also a easy plug in chip). The whole repair takes two hours for a homeowner and costs about 50 bucks for a chip.
1/26/2015 12:25:34 AM • Rheem Tankless... • Answered on Jan 26, 2015
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Have a Rheem PTG-74PVP tankless water heater.

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

Error 76 can mean communication failure between tankless and remote control, which can include bad remote control, bad wire, bad wiring connector, or PC board failure.
Disconnect remote control and see if tankless will work.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Error C8 76 can mean PC board failure.
Contact Rheem and/or service technician.

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1/14/2015 8:05:33 PM • Rheem Tankless... • Answered on Jan 14, 2015
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Richmond tankless water heater codes IL

http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#delime Code 1L is scale build-up. Delime heat exchanger. 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
1/12/2015 8:12:55 PM • Rheem Tankless... • Answered on Jan 12, 2015
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