Question about Rheem Paloma Tankless Water Heaters PTG-74PVN Tankless RTG-74PVN

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Hi, I have a Paloma Tankless water heater (model #PTG-74PVP). After running hot water, it emits a low whining sound that lasts anywhere from a few seconds to 30 seconds. I had a plumber look at it, but his hearing is bad and he can't hear the noise. My mom who is 78 also can't hear it, but I can and so can my 14 year old son. It is only when hot water is used, and it happens with demand from all faucets/appliances when hot water is used. It seems the heater cycles and then when it is done, this whine occurs. My plumber told me to get the manual--which somehow we don't have. I've tried contacting Paloma, but haven't been able to reach anyone. This model is no longer made. Any suggestions are appreciated! And, I am worried that there is a safety concern....thank you

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  • 142 Answers

Here is the site for the manual. You should be able to find it in there.
http://www.palomatankless.com/owners/homeowner+use+care+manuals.html
As for the noise, some models did have recall on them for defects.

Posted on Oct 16, 2013

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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

  • 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

  • 1015 Answers

SOURCE: I have a Paloma PTG-74PVN

Try turning the thermostat uo a small amount and see if this makes a difference. I suspect the control board is bad but I would try adjusting t-stat before I spent money on board or service call. Thank you

Posted on Dec 16, 2010

  • 17 Answers

SOURCE: Paloma tankless water heater model no PTG-74XP-2 error code c8

In several cases i have had to change the pcb board.... code 76 is no communication between remote thermostat and pcb..... this is a problem the first generation rheems seem to be having.... contact rheem if under warranty you will need to get pcb and program chip sent to you. Really need a experienced tech to install board and program it for you...... hope this helps...

Posted on Aug 24, 2012

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Could be a restricted inlet pipe just as you suspected.
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
error 15 is 'Boiling safety device'
"Check for closed water heater inlet valve or restrictions in cold water inlet pipe (must be fully open).
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On commercial water heater, lower setpoint temperature below 180F at high altitude."

Open following links for Rheem tankless resources including Rheem chat and phone support:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://www.rheem.com/products/tankless_water_heaters/customer_support/

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Hi. We have a Paloma Tankless Water Heater model no. PTG-74PVN-1 and we keep getting the error C 7-76 or C 8-76. We cleaned the filter but the problem is not going away. The hot water turns off after a...


Open following link for Rheem/Paloma/Richmond/Ruud tankless troubleshoot resources including error codes, self help, manuals, parts links, tips, and contact information.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Add a comment with your experience so others with same-similar problem can benefit.

Also 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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I have a poloma model PTG-74PVP hot water heater. This morning we went to use it and it will run a minute or two the flash alarm 35. We have had the unit for four years with no problems what so ever.


rtgl-74xp.jpg RTG-95XP Item Name: Outdoor Rheem Tankless Water Heater RTGL-74XP Item Price: $910-$1100 Gas Type: Propane Venting: No Item SKU: Rheem RTG-95XP replaces RTG-74XP Product Description: Rheem Tankless Water Heater RTG-95XP



Be aware of this --- http://www.cpsc.gov/cpscpub/prerel/prhtml07/07108.html


And this ---

Rheem RTG-95XP replaces RTG-74XP


This makes getting information hard to come by. Please use the link below for information.

http://www.rheemtanklessonline.com/contact.php


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http://www.palomatankless.com/owners/homeowner+trouble.lasso#28-11
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Contact your plumber to service the Paloma by flushing out the lime.
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HTH,

Mike...

Dec 06, 2009 | Rheem Paloma Tankless Water Heaters...

1 Answer

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

May 18, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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