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

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THE Indoor tankless heater will turn on(with hot water on), light the priority light for 5 seconds, then the light will go off and the control reads a C2 11 error code. can you email me the 11 page document on how to clean the burners if you think this will solve my problem? Thank you~ Heidi

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Before calling service technician, best way to approach this problem is to contact Rheem with your specific model and serial number.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are starting place for troubleshooting.
C2 11 is gas and ignition related.
The same symptoms on your tankless unit can have different cause and solution than another tankless unit.

The burner might need to be cleaned.
Undersized gas meter, or low gas pressure should be checked.
Air in gas line.
Short circuit in gas solenoid.
Bad igniter.
Igniter wiring harness.
Tankless is not grounded.
Vent exceeds allowable height or length limit

All gas water heaters require periodic maintenance.
The manual is a good place to start for advisories and troubleshooting and required maintenance.
Tankless water filter should be cleaned monthly, and heat exchanger de-limed yearly.

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.

Posted on May 19, 2011

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I have a bosch aquasar 125b tankless water heater and the burners do not light when hot water is turned on this also causes the pilot light to go out


possible faulty pressure switch connected to the water line and that is failing to turn on the main gas tap solenoid
best have it checked by an accredited gas fitter or service center for the make

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Moved into a house with an existing Rinnai system. We have controllers in the kitchen and bathrooms. My understanding was that you can change the temp by hitting the priority button then up or down as long...


You need a product manual for your tankless computer that heats water.
Look on side of unit for label.
Then google that brand and model and add .pdf to search parameter to find possible resources.
Or try Rinnai website for a dose of promotion about how great their product is.
If unit is a few years old (age of unit accessed with serial number), there might be no manuals posted online since manufacturers often drop manuals from website after a few years, assuming most their products no longer function correctly and thus avoid available knowledge for customer to talk specifics... instead telling customer to call service tech who of course does not have manual either because he is a tech and needs one, but got hired last week to his new esteemed position and gets paid by service call not by successful repair except bonuses for recommending replacement unit.

Read the manual. Especially required maintenance, such as deliming yearly and cleaning water filter.
Note resources for maintaining tankless appear on following link except for different brand tankless computer:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#de-lime

Also scroll down page to read explanation of high temperature limit for tankless before causing irreversible problem with your computer requiring skilled technician.
Also scroll up on page to read about no error code, since cooler than normal temperatures from tankless computer can be result of common plumbing problems like defective single-handle faucet cartridge. Or power surge, since tankless are not protected from ordinary surge event like power restored after outage.

If your tankless computer is older than 5 years, then assume it will not work better than your 5-year old cell phone or 5-year old laptop, or behave better than 5 year old child. So don't assume you are doing something wrong... just assume it doesn't work despite glossy advertising brochures from tankless manufacturers claiming 20 year lifespan for tankless computers.

Install tank type heater yourself, same day and avoid computer water heaters: Ordinary plumber can fix these units easy.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Gene
h

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1 Answer

I have a new Richmond tankless. Every time someone turns on the water for a second the water heater comes on for a second. Is this ******* the unit ? I tell people to just use the cold water tap if th


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

If tankless comes on when HOT tap is turned on, then that is normal.
If tankless comes on when cold is turned on, then you might have crossover:
http://waterheatertimer.org/Crossover.html
If tankless comes on when single handled faucet is lifted in center, then that draws water from hot pipe and will activate tankless > so don't install single handled faucets to save water heater energy, regardless what type water heater you have.

Tankless require monthy-to-yearly maintenance to avoid common error codes. The product manual recommends yearly service. Since Rheem does not post service manuals, you generally have to pay somebody to take apart and test the unit. The cost of this far outstrips expected savings from owning expensive water heater that requires lots of maintenance, yet is heavily promoted as the solution to water heater problems.

Never install tankless water heater is best way to avoid complications of expensive water heater that is maintenance heavy, hard to diagnose, expensive to fix, etc.
Never expose tankless to more than 11 grains hard water.
http://waterheatertimer.org/pdf/Rheem-CondensingTankless-maintenance-2012.pdf

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

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1) I would contact BOSCH, or a service technician:
Tankless are affected by many internal and external factors and can be a combination of factors:
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ESTechSupport/Troubleshooting/tabid/1295/Default.aspx

2) Google search 'bosch tankless water heater fixya' to see cross section of problems/solutions: .
For example:
http://www.fixya.com/support/p949576-bosch_1600h_lp_liquid_propane_aquastar_a/solutions

3) Read manual for yearly maintenance protocol.
For example, tankless should be de-limed each year.
a) U-tube search for 'de-lime tankless water heater'
b) Open following link with photos of de-liming in downloadable pdf format
http://waterheatertimer.org/pdf/Delime-tankless-water-heater.pdf

5) All costs are energy.
You can also add simple tank-type water heater that can be turned on when tankless is offline.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

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http://www.rheemtankless.com/content/tankless/rheem/help.shtml

This is there website.Above.
Use the live chat to ask them, the code you listed does not seem to correspond to there code list, the only code that does is code 76,
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