Question about Rheem EcoSense by 4.2 GPM Tankless Water Heater LP Gas

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Ptg 74pvn 2 rtg 74pvp

Hi Dear! My Eco sense thankless water heater model # RTG74PVN2 provide 3 minute hot water only. On the thermostat screen appear code C4 76 when I reset by turning the thermostat off and on it appears normal temp. of 120 I also can't increase or decrease the temperature. Can you help me to solve this problem?

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  • Rheem Master
  • 5,089 Answers

Copy following links for rheem/eco-sense error codes, manuals, required yearly maintenance, support number and resources.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
Probably bad PC board, or bad remote control

Gene
h

Posted on Nov 22, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

gary1121
  • 332 Answers

SOURCE: Paloma PTG 74PVN Tankless Water Heater

did you check the filters on the the water valves, i am not exactly sure about your codes that are shoeing but if you could read it and post them, i know on some of the units 76 means there is low water pressure and the filters are behind 2 caps one on each side above the shut off valve take off the caps and remove the screens, clean them and replace them ,, make sure you turn off the water on both side first or you will get wet

Posted on May 29, 2009

snap101
  • 117 Answers

SOURCE: Model PTG-74PVP-2 Error Code A0 21

check to make sure the air vent is clean and that the front cover is on properly

Posted on Aug 11, 2009

  • 244 Answers

SOURCE: Rheem water heater turns off by its self

Flashing code 76 is lost communication between the remote and the burner control assembly CCA (circuit card assembly). The CCA is still under warranty if purchased within the last 3 yrs. Contact Rheem customer service and have your Mod. and S/N available....explain to the agent you are recieving - flashing code 76...they'll walk you through the process.

Posted on Nov 01, 2009

  • 244 Answers

SOURCE: I have a paloma tankless water heater about 3

I had the same problem with my Paloma a year and a half after installation...contacted Rheem customer service (800-432-8373) and they recommened a local installer in my area. The technican diagnosed the problem as the "flow control valve"; he managed to get Rheem/Paloma to cover the part under warranty...I only had to shell out the money for the install.

Posted on Nov 06, 2009

  • 244 Answers

SOURCE: PALOMA PTG-74PVN-1 Code C8 12 my water heater

C8 is the last stop in the point of burner ignition and a total of eight error codes. Error code 12 is a supplemental code that means your LP gas supply is too low...have your LP tank service and try again.

HTH,

Mike...

Posted on Dec 06, 2009

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Copy following link for troubleshoot resources:
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did you check the filters on the the water valves, i am not exactly sure about your codes that are shoeing but if you could read it and post them, i know on some of the units 76 means there is low water pressure and the filters are behind 2 caps one on each side above the shut off valve take off the caps and remove the screens, clean them and replace them ,, make sure you turn off the water on both side first or you will get wet

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