Question about Rinnai Digital Remote Water Heater Control Mcc-45-4us

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Rinnai tankless water heater. gas will not ignite automatically . have to bleed gas screw on heater every time.

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  • dsqrd2 May 11, 2010

    Sounds ridiculous and terrifying...LOL Which "screw"? The one inside the the heater on the manifold or the one on the incoming gas line?

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CHECK THE AMOUNT OF PRESSURE COMMING IN TO HOUSE, MIGHT HAVE TO CHANGE THE METER, OTHER GAS ITEMS IN THE HOUSE ARE STARVING THE UNIT AND TAKING FROM IT

Posted on May 29, 2009

  • 1 more comment 
  • gary miller
    gary miller May 29, 2009

    YOU METER IS NOT ALLOWING ENOUGH GAS TO THE UNIT WHEN OTHER GAS ITEMS ARE ON THERE FOR STARVING THE UNIT FOR WHAT IT NEEDS TO OPERATE

  • gary miller
    gary miller Jun 06, 2009

    it sounds like you may have a gas valve issue, screen clogged it the gas valve or not enough pressure on the gas side of the unit,, if your getting air in the system there is a big problem beings it is gas, recomend having a tech come out and do a pressure teast on the gas line and the unit,, be careful this is gas

  • gary miller
    gary miller Jun 06, 2009

    I tried to answer this one a couple of days ago,, the only reason you would have to bleed a line is because of a leak, either your gas valve is leaking or your gas line is leaking but you do have a leak and should ge a leak detector to find it, the only other thing would be if you don't have enough pressure going to the unit or you have a pressure regulator that is gone bad, other then that there is no reason for you to have to do this

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Posted on Jan 02, 2017

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SOURCE: Rinnai tankless water heater code 12

12 - Flame Failure or Poor Ground

1. Immediate code 12 is usually a defective gas valve, power supply problem, or defective fan motor wiring harness.

2. If code 12 occurs after a few seconds it indicates that proper operation was established, but then stopped unexpectedly.

3. Verify that fuel is being supplied to the unit.

4. Check for proper electrical ground. Unit must use a grounded power supply.

5. Check for flue blockage on inlet or exhaust.

http://www.foreverhotwater.com/service-codes.php

Posted on Dec 31, 2008

CRTN
  • 716 Answers

SOURCE: No water flow from hot water tap with a rinnai tankless water hea

Its A Possibility The Left Over Water In The Hot Is Frozen. If Your Line Is Exposed Outside Somewhere It Can Easily Freeze Up. Turn On The Hot Water Everywhere In The House And If Accessible Check The Lines To See Where The Warmth Ends. You Can Leave One Off Over Night In Hopes That It Will Eventually Defrost.

Posted on Jan 16, 2009

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SOURCE: vinegar flush

You should not have to flush unless the code LC comes up. but here is the flushing diagram.

Posted on Aug 01, 2009

  • 1 Answer

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

My Paloma tankless water heater had a code of C7 - 76. I called the service center at 866-720-2076 and they stated this code showed a communication error between the Water Heater and the thermostat; they stated it was still under warrantee and they would replace it for free. Also, I found out there was a recall related to the door properly shutting. To make it work while waiting for the repair, I would turn off the thermostat, wait 2-3 minutes, and turn it back on. Usually it would work for enough time to shower.

Posted on Oct 06, 2010

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Code 11. had hot water last night


Code 11 is for no ignition.
Here is what I find:

Check that the gas is turned on at the water heater, gas meter, or cylinder.
Ensure gas type and pressure is correct.
Ensure gas line, meter, and/or regulator is sized properly.
Bleed all air from gas lines.
Verify dip switches are set properly.
Ensure appliance is properly grounded.
Disconnect EZConnect™ or MSA controls to isolate the problem.
Ensure igniter is operational.
Check igniter wiring harness for damage.
Check gas solenoid valves for open or short circuits.
Remove burner cover and ensure all burners are properly seated.
Remove burner plate and inspect burner surface for condensation or debris.

IF it has been working fine and now it isn't, I would suspect an ignitor problem.

Nov 29, 2014 | Rinnai RL94iN Natural Gas Tankless Water...

1 Answer

I have bought a used Rinnai R94LS natural gas tankless water heater and need to know which thermostat to buy for it? I have bought a used Rinnai R94LS natural gas tankless water heater and need to know...


Plumbcentre have a parts desk for gas appliances.
most appliances are available to view in an exploded view with clear identification of parts.
However when it comes to gas, I strongly advise on using a GASSAFE engineer

Nov 18, 2014 | Water Heaters

1 Answer

Controller not working


The rinnai is a computer that heats water. It is not ordinary water heater most people are familiar with, and repairs are not do-it-yourself, requiring a trained technician qualified in that brand who can diagnose both computer and water heater problems and plumbing problems.
Call rinnai for recommended local technician. Click on support tab. Note their webpage is very short on repair details, unlike companies that sell tank-type heaters... because tankless units are not do-it-yourself.
http://www.rinnai.us/tankless-water-heater
Problem might be simple blown glass fuse on circuit board or complete failure of computer and sensors.
Here is page written for Rheem tankless, that explains general complexity of tankless computers, and showing required maintenance, such as deliming each year:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
To save problems with tankless computers plus anticipated expense of maintenance and repairs, I recommend homeowner install tank-type gas water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html
Also install one-time-use whole house surge protector, and install grounding rods to prevent further damage... lightning frequently likes the same places over and again:
http://waterheatertimer.org/How-to-wire-Whole-house-surge-protector.html
Gene
h

Aug 12, 2013 | Rinnai Water Heaters

1 Answer

Rinnai 20 heater stopping and starting have changed regulator but still not working properly only started playing up i have been in house 2 years any more suggestions


Single-handle faucet cartridge that leaks can cause tankless not to function. Check for crossover or cross connection:
http://waterheatertimer.org/Crossover.html
Cut losses from owning tankless computer that heats water. Go to Lowes and buy new tank-type gas water heater for $390 and have hot water right quick with less maintenance and own a product that homeowner can repair themselves.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
Otherwise call service technician who is qualified to work on tankless computer.
Gene
n

Aug 07, 2013 | Rinnai Webstone The isolator EXP tankless...

1 Answer

Rinnai Trouble Shooting


Clean water filter.
Delime heat exchanger.
http://waterheatertimer.org/How-to-delime-tankless-water-heater.html
Add tempering tank to preheat cold incoming water.
http://waterheatertimer.org/Tempering-tank.html
Check for bad single-handled faucet cartridges.
http://waterheatertimer.org/Crossover.html
Don't install multi-sensor computer-chip water heater to water lines and gas line and vent pipe since tankless will develop unsolvable problems.
Contact Rinnai and hear them tell you to call service technician, only to discover there are no qualified service technicians in your area who might be able to solve problem. 1-800-621-9419
Ask why the Rainnai site has much promotional information and no service manuals. Nor does Rinnai offer forum where tankless owners can freely exchange their endless unsolvable problems for all to see.

May 16, 2013 | Rinnai Tankless Water Heater R94lsi W/...

1 Answer

RINNAI R94LS CONVERT TO NATURAL FROM PROPANE


The electric water heaters have replaced the traditional of water heating. The advanced features and the latest technologies of water heater have made it so easy for everyone. Find the best electric water heater on the market today. Read electric water heater reviews and comments from experts. Almost each product is manually reviewed and tested.
Electric Water Heater List Reviews waterheaterlist com

Jan 28, 2013 | Rinnai R94LSi Tankless Water Heater...

1 Answer

Electical connection for ru98e


Rinnai RU98e is gas water heater with .4 gallon per minute activation.
This tankless gas water heater plugs into ordinary 120Volt 60 Hz outlet and consumes 63 watts when running.

For electric tankless:
Copy following links for illustrated walk-thru and wire-breaker size calculation for electric:
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

Oct 31, 2012 | Rinnai Water Heaters

1 Answer

MODEL NO. RTGL 74XN\r\nNOT WORKING SAYING CODE [C211]


Before calling service technician, open following links for Rheem troubleshooting resources:
C2 11 is no ignition:
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Tankless water heater should have yearly maintenance that includes cleaning burner parts, with check of ignition parts, wiring, ignition sequence, gas supply, and bleed gas line if needed.
Chances are that your unit needs to catch up on maintenance.
Maintenance can also catch any condensation problems and make venting adjustments so parts are not degraded due to vent issues.
Tankless should also be delimed each year to preserve efficiency of heat exchanger.

Jun 29, 2011 | Rheem Tankless Water Heater RTG-74XN-1,...

1 Answer

Code 11 water heater comes on for short period and shuts off


this is a tricky one, it means no ignition,which could just be a dirty flame sensor, low gas pressure, or no spark to ignite the burner. sorry but this one requires a rinnai trained service man

Nov 17, 2009 | Rinnai Webstone The isolator EXP tankless...

2 Answers

Rinnai r94lsi comes on 5 sec. then off


if it's a gas unit you mite have to bleed the gas line in and out.

Jan 04, 2009 | Rinnai Webstone The isolator EXP tankless...

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