Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm - Page 6 - Answered Questions & Fixed issues

Hi,

I was able to locate a manual for your unit.

See the link below:

http://demandware.edgesuite.net/aabh_prd/on/demandware.static/Sites-Appliance-Site/Sites-CompactAppliance_Primary/default/v1300218722880/pdf/ownersmanuals/rheem/RTG74IndoorOutdoor_owners.pdf

Then see page 33. The error code you describe is not specifically listed, and the manual advises that you call their customer service number for further assistance. This is the text for customer assistance:

Manufacturer's National Service Department at the following address:

2600 Gunter Park Drive

Montgomery, Alabama 36109-1413

Phone: 1-800-432-8373.

When contacting the manufacturer, the following information will be requested:

a. Model and serial number of the water heater as shown on the rating plate attached to the front panel

of the heater.

b. Address where the water heater is located and physical location.

c. Name and address of installer and any service agency who performed service on the water heater.

d. Date of original installation and dates any service work was performed.

e. Details of the problem as you can best describe them.
f. List of people, with dates, who have been contacted regarding your problem.

You need the RHEEM training manual [email protected]

Hi there may be a number of factors involved with this appliance,
1. if you are opening a hot tap/faucet only slightly there may not be enough water flow to keep the burner alight. try turning on the tap alot at first then decrease the flow to your required amount
2. there may be a blockage or partial blockage in your gas supply.
3. water may have entered the casing and got into the electrical componenets of burner jets
And lastly if your Rheem unit is past its warranty & you can't get a service technician out to check it, then your last resort would be to get a qualified person to have a look at it

http://www.greatergoods.com/store/energy-savers/tankless-water-heaters/rheem-rtg-74-dvn-natural-gas-tankless-water-heater/prod_386.html
manual above.
I professionally recommend that you get a Plumber/Gasfitter, to check this over, as this isn't usual, and I wonder if there are not "Other" problems too... with anything that uses Gas one has a responsibility to the entire family to have it professionally checked over, in my humble view..

1) Read your manual

2) De-lime unit on yearly basis:
Search google and Utube for 'de-lime tankless'
They make special fittings that permanently attach to water ports so you can delime each year.
Research shows that reqular de-liming will not restore tankless efficiency.
http://waterheatertimer.org/pdf/Delime-tankless-water-heater.pdf

3) Typical manual shows temp information on page 22-23. Search pdf for 'temp'
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

4) Read maintenance steps shown in manual
The word maintenance appears throughout the manual

5) Search fixya questions on tankless to glean information about your unit:
Older answers have more responses, and each seems varied as techniques succeed for one person but not another.
The quantity of unanswered questions and vague answers reveals why Rheem suggests qualified technician be added to your rolodex-wallet
http://www.fixya.com/tags/rtg_74pvn

6) Other useful links for tankless owners:
http://waterheatertimer.org/pdf/Paloma-Tankless-Error-Codes.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add a comment for more free help.
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.

1) The best place to find this information in your manual.
Typical Rheem manual in my files shows temperature is adjusted by pressing UP and DOWN temperature buttons on remote.

2) Manual says: Temperatures of up to 140°F
(60°C) for Light duty models and up to 180°F
(82°C) for Heavy Duty models can be
achieved with the MAIN (UMC-117) remote
control and a dip switch adjustment. Only
qualified service personnel should perform
this adjustment. Only factory authorized
remote control(s) should be used.

3) Typical manual shows information on page 22-23. Search pdf for 'temp'
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

4) This information squares with what I heard before that trained service technician is needed to adjust water temperature.
I think Rheem does this since tankless will not achieve that rise in temperature if incoming water is cold.
BTUs put out by tankless burner has limit.
If incoming water is colder than certain temperature, then tankless cannot raise temperature quick enough as water passes through burner.

5) You might also need a tempering tank, to modify cold water in winter:
http://waterheatertimer.org/Tempering-tank.html

6) Suggest you also read the yearly maintenance required for tankless.
For example tankless are prone to lime build up and need to be de-limed each year with vinegar.
Lime build up will certainly affect water temperature.

7) Following 2 links might be helpful for tankless owner:
http://waterheatertimer.org/pdf/Delime-tankless-water-heater.pdf
http://waterheatertimer.org/pdf/Paloma-Tankless-Error-Codes.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add a comment for more free help.
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.

Open following error-code link in downloadable pdf for your files:
http://waterheatertimer.org/pdf/Paloma-Tankless-Error-Codes.pdf

Error code 11 has to do with ignition/gas/gas pressure/electrical grounding.
This can be caused by internal part failure or combination of internal or external factors.
I suggest reading pdf, and then calling service technician who specializes in your brand.

Open typical manual to review required regular maintenance for tankless on page 29
The word maintenance is used throughout manual, indicating that tankless are a yearly budget nuisance
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

Open following link to view fixya questions on 1 model of Rheem tankless
Some older questions have information that is useful, and varied
This will give you cross section of problems that are faced by others with same/similar product as yours.
http://www.fixya.com/tags/rtg_74pvn

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

C-8 error codes could mean anything from the fan not starting, a bad control board, or a blown capacitor. Best bet would be to call Rheem customer service and they'll ship part or suggest licensed contractor to troubleshoot and replace what's necessary.

Open following link to view fixya questions on 1 model of Rheem tankless
Some older questions have information that is useful, and varied
http://www.fixya.com/tags/rtg_74pvn

Open typical manual to review required regular maintenance for tankless on page 29
The word maintenance is used throughout manual, indicating that tankless are a yearly budget nuisance
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

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

Error code 76 has to do with communication fault with remote
Error codes here: http://www.palomastore.com/paloma_error_codes.html

Error 21 means the air intake cover problem.

Malfunction of Air Intake Filter Switch Ensure air filter door is properly seated.
Ensure front panel is properly installed.
Error codes here: http://www.palomastore.com/paloma_error_codes.html

Richmond is Rheem
Typical manual shows regular maintenance on page 29:
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf
The word maintenance is used throughout manual.
Tankless are prone to lime build-up and should be de-limed each year, and cannot be exposed to more than 11 grains of hardness in the water.

Add a comment for more free help.
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.

I think error code C8 is #13
It has to do with air quality, lack of sufficient air, or lack of venting or dirty air filter.
Check following links to see if they have information:

Check following link for recall list:
http://www.tankless-recall.com/tanklessSearch.aspx
Manual shows error 05 or 13:
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

This should help you http://www.tankless-water-heaters.com/troubleshooting.htm

Hi,
The best way to thaw it is to use a heat gun or a hair dryer....keep the gun back enough so that you heat it slowly and keep it moving all the time so you do not get too much heat in one spot....

this will thaw it out for you...

heatman101

Rheem Tankless Water Heater Selection and Installation Videos

• Introduction - time 04:11
• Pre-Qualifying the installation - time 01:13
• Selecting the Right Product - time 01:48
• Key Differences Between Tankless & Storage Heater- time 01:27
• Choosing the Location - time 01:20
• Installation: Major Components - time 00:58
• Installation: Tools Required - time 00:48
• Installation: Mounting the Heater - time 01:15
• Installation: Plumbing & Gas Connections - time 04:29
• Installation: Side Wall Vent Termination - time 02:41
• Outdoor Installation - time 01:21
• Connecting the Remote Control - time 01:42
• Turning on the Water Heater - time 01:00
• Commercial vs. Residential Products - time 01:47
• Manifolding Multiple Units - time 01:43
• Troubleshooting & Additional Support - time 01:01

call here for your answer


1-866-720-2076
Available between 7AM - 7PM Central Time
7 days a week

Check manuel for code

get a different brand water heater

Hi,

If you are not getting a code then that means that the heater is not even trying to light...
The trigger that makes the whole process start is the flow switch.
So, the water is going through but it is not tripping the flow switch to tell the heater to light.
I would say that the first thing to check/replace is the flow switch...


heatman101

Sorry to read about your problem, I hope this helps you out.

your WC pressure is fine it needs 3 and you have 5, can handle 8
The gas company adjust at meter, you have other issues

Check gas solenoid valves for open or short circuits.
Ensure igniter is operational.
Check igniter wiring harness for damage.

THIS IS A GAS PRODUCT, INCORRECT REPAIR CAN CAUSE A EXPLOSION, AND DEATH CAN OCCUR. IF YOU DO HAVE THE PROPER TOOLS SUCH AS MANOMETER AND LEAK DETECTORS, I SUGGEST YOU CONTACT A SERVICE COMPANY

CLICK HERE for your manual.

The P1 error is not in the manual - but it indicates the backflow preventer (check valve) is not fully closing, and should be replaced.

This is a repair for a qualified technician.
Please call them to set up service @ Phone: 1-800-432-8373.

Thanks!