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What can I do to fix error code 13 Paloma tankless water heater PTG2-42PVN

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The error code 13 indicates that the PTG2-42PVN is not getting enough air or the vent termination is blocked. Check both the intake and exhaust termination for blockages and remove any debris. Make sure that you have good air flow in the room (no other vents should be blocked). Clean any other blocked vents. If you use a fireplace or space heater in that area, open a window or vent to increase the oxygen levels in the room. If other appliances are used in the area, make sure that they aren't affecting the ventilation and oxygen levels in the area. If you bring in air to the water heater from the outside, make sure that other appliances aren't exhausted to that area.

ManualsLib has the manual for the PTG2-42PVN: https://www.manualslib.com/products/Rheem-Ptg2-42-Pvn-Pvp-330558.html . The error codes and solutions are listed on page 33: https://www.manualslib.com/manual/140606/Rheem-Ph-16-Fisn-Fisp.html?page=33#manual .

I hope this helps.

Cindy Wells

Posted on Dec 18, 2016

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Posted on Jan 02, 2017

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gary1121
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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

  • 1 Answer

SOURCE: My Paloma tankless water heater flashes C2 11 error code

I just had the same problem and I fixed it in about an hour or 2. First shut off the gas,water and power(unplug it) Take off the cover There are about 20 screws above the electrical circuit board. You have to remove all of those screws to remove plate that is covering the burner assembly. The burner assembly has these 3 pins that look like number 7's these are covered with build up and gas can't flow right. That's why you get the c211 error not enough gas. Take a wire brush and gently remove any build up, I also cleaned the thermocoupler which is next to the burners. It looks like a metal pin with a couple of wires coming out of it this was also very dirty. I took a can of air and basically freshened it up It works perfect now. Email me with any Q's at Mario@myredr.com Good Luck All that you need is a long phillips screw drive and a drill because its about 25 screws
The burner assembly has 2 screws all the in back underneath the assembly once you remove those 2 the assembly comes out . You don't have to disconnect any wires.

Posted on Oct 29, 2009

  • 244 Answers

SOURCE: Paloma tankless, gas, water heater, error code C7 76

If you look on the left hand side of the burner control module you'll see 4 capacitors - the capacitors have most likely failed...pretty sure anything code 76 is P/S failure. It may also be covered for manufactures defects. If the cap is blown..the top will be slightly raised as apposed to flat like the other nearby caps - they are called top blow capacitors...the damage should be evident.

Posted on Nov 01, 2009

  • 13 Answers

SOURCE: paloma tankless ptg42 water heater error code c4/13

4 error message, the 4th (last) error code is #13, not enough oxygen.

Check the location of the heater, if it is fine the ODS sensor (actually is a thermal couple) is bad.

Posted on Feb 12, 2010

  • 67 Answers

SOURCE: rheem gas tankless water heater with error code c4 13

problem is inside burner compartment o2 sensor dirty or block..need to have a qualify technician clean it.

Posted on Jul 31, 2010

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1 Answer

My paloma tankless water heater flashes 13 error code


1) Before calling service technician, copy following link for Rheem tankless troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Error 13 is probably bad PC board.
Like a bad motherboard on computer.
Rheem will send another one.

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Error 13 paloma tankless hot water system. no hot water


Before calling service technician, open following links for error codes, Rheem/Paloma chat and tech support, and possible manual:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://www.fixya.com/support/t3444443-paloma_tank_less_water_heater_flashes

Error codes are considered start-point for troubleshooting.
Tankless manuals recommend yearly service including burner cleaning, gas pressure and plumbing check, de-liming etc to prevent problems and so technician is familiar with that specific unit.

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1 Answer

I have a paloma tankless water heater, ptg-42pvn. It was flashing, C4, 13 and now it only flashes -0, 13 and will not even turn on. Tried to reset it by unplugging it and it only flashes -0, 13 even...


Multiple error codes can mean different things, including bad PC board.
C2 13 might be the oxygen sensor. -0 and no operation indicates bad board, but other things might be notched into same problem like loose connections.
Error codes are starting point for troubleshooting.
Before calling service technician, open following link for Rheem-Paloma troubleshoot resources including Rheem chat.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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1 Answer

Paloma tankless ptg42 water heater error code c4/13


4 error message, the 4th (last) error code is #13, not enough oxygen.

Check the location of the heater, if it is fine the ODS sensor (actually is a thermal couple) is bad.

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Paloma tank less water heater flashes code C4 13 and we have no hot water?how to fix it?


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.

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I have a paloma tankless water heater about 3 years old model PTG-74PVN and it works for 2 minutes and shuts off with error code C4 and 13 flashing. (City water pressure is fine)Can anyone help? Thanks...


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.

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