Rinnai Water Heaters - Page 9 - Recent Questions, Troubleshooting & Support

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

Get second opinion on water quality and electrical grounding of pipes:http://www.thetankatwaterheaterrescue.com/forums/forum3/Geneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

follow this steps and fix it. God bless youDrain a tank:

1. Shut off power at the electrical service panel and post a sign warning others not to turn it on.
2. Close the cold-water supply valve and open a hot-water faucet somewhere in the house (to speed draining).
3. Attach a garden hose to the drain valve and run it outside the house.
4. Open the drain valve and allow all water to drain out.
5. To refill the tank, close the drain valve tightly and open the cold-water supply valve. Also open a nearby hot-water faucet. When a steady stream of water flows from that faucet, the tank is full and the faucet can be closed.
6. Once the tank is full, turn the electrical power back on

Test and replace a heating element:

1. Turn off power at the electrical service panel and post a sign warning others not to turn it on.
2. Remove the access panel on the electric water heater.
3. Disconnect one of the element wires and set a multimeter to RX1000 (resistance times 1,000). Touch one probe to an element mounting bolt and the other to each element terminal screw, in turn. If the tester displays anything but infinity ( open circuit), replace the element.
4. If necessary, set the multimeter to RX1 and touch the probes to the terminal screws. If there is any resistance reading at all ( closed circuit), then the element is good. If not, replace it. Both upper and lower elements are tested in the same manner.
5. To remove the element, first drain the heater.
6. Disconnect the remaining element wire. Remove the mounting bolts holding the element in place. Remove the element.
7. Replace the heating element with one of the same model, shape, and rating. Make sure you also replace any installation gaskets.

Test and replace a high-limit cutoff:

1. Disconnect power to the heater at the electrical service panel and post a sign warning others not to turn it on.
2. Remove the upper access panel and push the reset button.
3. Replace the access panel and turn the power back on. If the water is hot, the reset was the problem. If not, you'll need to turn the power off again and reopen the access panel.
4. Use a multimeter to test the cutoff terminals for continuity. If faulty, replace with an exact replacement part.

Get the manual for it on line and look up the beeping meaning and the reaqon for the priority lite.

Go to the manual or go on line for the manual and look up the code and its meaning.

Google the brand and model number for the operating manual and look up the code and it's meaning.

Copy following link:http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intelliventGeneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Copy following link:http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#maintenanceGeneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Tankless computer is not working.Error 10 is blocked flue or inadequate air supply. Or failed PC motherboard, or failed sensor etc.Get more fresh air to unit. Check if bird built nest on flue pipe. If flue exits side of house, look for obstructions nearby that can slow the exit of poisonous vent byproduct into the air you breathe. For example trash cans and boxes or parked car etc.http://waterheatertimer.org/pdf/Rinnai-installation-and-error-codes.pdfCall service technician who is qualified to work on tankless computer. This will be a well-seasoned veteran of computer technology and plumbing expertise ... a plumber who knows how to fix computers lol.This person will catch unit up on required yearly maintenance, and check specialized operation conditions needed for tankless computers to function properly.If tankless computer is older than 5 years, then compare it to your 5-year old laptop, and assume same level of glitches and problems.Solve any tankless problem yourself, today, for $385 by installing tank type heater from local box store:http://waterheatertimer.org/How-to-install-gas-water-heater.htmlGeneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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-limeAlso 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.htmlGeneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

is there a dedicated gas supply line to the heater?gas supply is critical to tankless water heaters.they use a large amount of natural gas.

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-heaterProblem 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.htmlTo 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.htmlAlso 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.htmlGeneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7