Question about Rheem Paloma PTG-74PVN / RTG-74PVN Natural Gas Indoor

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Model PTG-42PVN There is no error code showing. I used the hot water last night, this morning I have very little water flow through any of the hot water faucets. I opened up the drain valve below the unit, same thing. I removed the water filter, there was nothing on it. I unplugged the unit and waited for approximately 10 seconds and plugged it in. Same problem. I left a faucet open then unplugged the unit, nothing. When I plugged the unit in, there was water flow for maybe 5 seconds (the unit sounded like it was on, then tapered off like I shut the water off). The system will not work while plugged in or unplugged. But once I plug the system in (lighted area in front of unit is off) it will allow flow of water for less than 10 seconds.

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According to the symtoms...sounds like you have a problem with the flow control valve. If less than 3 yrs old, contact Rheem Customer Support at (800-432-8373) and they can an authorized tech in your area to service the unit.

If the unit is out of warranty, I reccommend you still call customer support to find a local technician. Unless you're highly technical/mechanical, this is not a problem you should attempt yourself.

Thanks for trying Fixya.com

Mike...

Posted on Feb 07, 2010

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I have a paloma tankles water heater model #ptg-42pvn i am getting an intermitent error code C4,12. what is the problem?


Copy following link for Rheem-Paloma tankless troubleshoot and error codes:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/How-to-install-gas-water-heater.html#install

If unit worked before: Maybe bad PC board. Maybe lack of required yearly maintenance.
Common error codes can be caused by not following maintenance protocol such as cleaning combustion parts, checking gas pressure, checking venting, and air intake, bleeding gas line etc.
Too bad Rheem-Paloma manuals do not show HOW to conduct this maintenance, leaving customer with many unknowns, and no way to oversee that maintenance performed by hired technician is complete, and matches recommended maintenance.
Sell unit on ebay, and install tank-type gas water heater.

Mar 20, 2013 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

My PTG-42PVN h20 heater is allowing h2o temp to fluctuate from one extreme to another.


Does same thing happen at all faucets?
Are you getting error code?
You might have crossover problem with defective faucet cartridge.
Copy following links for troubleshoot resources:
http://waterheatertimer.org/pdf/No-Error-Code.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Aug 08, 2012 | Rheem Water Heaters

1 Answer

Getting a error code C2 82 on PTG-42PVN / RTG2-42PVN Natural gas indoor


This error code will occur for two reasons:

1. The heater has lost its programming and you will need a new programming chip from Rheem. (866) 720-2076
2. The igniter module is located behind the Printed Circuit board and will need to be relocated.

Apr 10, 2012 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

I have Paloma PTG2 42PVN No water flow when I open the faucet. I turn the water heater off at the remote and then back on and I get water flow for about30 seconds and the water is warm, then the whole...


Question is not clear.
Does all water flow stop? Or does hot water flow stop?
Open following links for possible help.
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Low-hot-water-pressure.html
http://waterheatertimer.org/pdf/No-Error-Code.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Add a comment for more help.

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Sep 12, 2011 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

What size venting do I need for the ptg-42-pvn?


3" category III stainless for special venting

Tanklessking shows Category III stainless steel vent kit for this model
3" vent
http://tanklessonline.com/rheem-water-heaters-RTG42.html

ptg-42-pvn has minimum 31,000BTU and max 118,000BTU
Max water temperature 120 degrees F
Spec sheet says: 3" special venting
http://www.palomatankless.com/products/42/specifications.html

Hart and cooley show special vent 3" stainless thru-the-wall vent
http://www.hartandcooley.com/specialgasvent/PDF/851515%20Tankless%20Water%20Heater%20Installation%20Vent%20Kits%20sell%20sheet%20-%20HC%20-%20low%20res.pdf

Hot water sources shows thru-wall or thru-roof
http://www.hotwatersource.com/RTG42PVN-Rheem-Indoor-Natural-Gas-Tankless-Water-Heater/RTG42PVN,default,pd.html

http://waterheatertimer.org/pdf/Tankless-roof-vent-installation.pdf

Aug 17, 2011 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

Rheem Paloma PTG-42PVN, No hot water. error C4 56 can u help?


get ready to pull that one out and get a different brand

worked on mine for a year and a half and replaced everything and the unit would still not run.

Jan 19, 2011 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

My Paloma 42PVN shuts down and shows code IL. The manual says it's Lime deposits. How do I remove these deposits. The unit has been running fine for over 1 year but now it only runs intermittently and...


You need a 5 gallon bucket and a small sump pump that connects to a garden hose. The hose connects to the inlet of the water heater and and then run a second hose from the hot water outlet into the bucket. Pour in about a gallon of white distilled vinegar. Turn the pump on and let the vinegar run through the heater for 15 minutes. Reverse the hoses and run another 15 minutes. reconnect the heater and test the water flow. You may need to repeat these steps several times to remove enough debris and buildup.
Installing a water softener treatment system will prevent the buildup from occurring so fast, if ever again.

Oct 15, 2010 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

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