Question about Rinnai Webstone The isolator EXP tankless water heater Service Valves WRIK
My gas water heater won't fire up and flashes code 12 on the screen. I need a list of trouble codes to find out what this means.
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.
Posted on Dec 31, 2008
I have a rinnai tankless water heater
the gas valve has been replaced
the problem only occurs in the summer in the heat of the day
the heater shuts off and a code 12 appears
when the unit is turned off and then back on all is fine for a while
the unit sets inside the garage and is vented out the brick [horizonally] about 2'
Posted on Jul 30, 2009
Check your vent pipe to make sure air inlet side is clear and interior Metal piping is connected together thru out to prevent air discharge and air intake from cross contamination , this causes unit to function during slow flow rate ( lav ) but show 12 code during higher flow rate usage (tub ).
Posted on Jul 27, 2013
Check any other appliances that run on gas during that period...might have a problem with a regulator outside. Sometimes if they are exposed to direct sunlight, the metal inside can expand and stick. Usually they will hum occasionally when warm under heavy load
Posted on Sep 14, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 27, 2015 | Rinnai Water Heaters
Oct 11, 2012 | Water Heaters
May 09, 2011 | Rheem Tankless Hot Water Heater...
Oct 07, 2009 | Rinnai Webstone The isolator EXP tankless...
Sep 29, 2009 | Rinnai Webstone The isolator EXP tankless...
Sep 21, 2009 | Rinnai Webstone The isolator EXP tankless...
Jul 28, 2009 | Rinnai Water Heaters
Mar 09, 2009 | Rinnai Webstone The isolator EXP tankless...
Jan 21, 2009 | Rinnai Digital Remote Water Heater Control...
Nov 21, 2008 | Rheem RTG-53PVN Indoor Natural Gas...
7,000 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: