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Re: Rinnai RHFE 1004F Error code 49
A 49 error code is caused by the pressure switch either not proving or a bad component. Check the hose attached from the plastic elbow located behind the heater going to a small square pressure switch found inside the heater. It may have come loose or a mouse may have taken a bite out of it. Also while you are behind the heater, pull off the hose that looks like a vacuum cleaner hose and run the heater with it unattached. If it runs, you have a blockage in the vent. If not, take a flashlight and go outside to the vent. Look down the center pipe for any obstructions. If it still does not work, you may need a new pressure switch.
While the front panel is off the heater, cycle the heater to attempt a start. You want to make sure the blower turns. If it does not, check the wire connections to it. You may be looking at a bad blower. If it is turning but still does not start, we are looking at a bad pressure switch.
Let me know what you find, I may have a switch or blower motor that you can purchase.
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IF THIS UNIT HAS SPARK IGNITION THE IGNITORS ARE PROBABLY OUT OF ADJUSTMENT WHICH IS LIKE HAVING TO WIDE OF A GAP ON A SPARK PLUG . IF YOU MAKE GAP OF IGNITOR ELECTRODES APPROXIMATELY 1/8TH OF AN INCH APART IT SHOULD LIGHT AS LONG AS YOU ARE GETTING VOLTAGE FROM IGNITION COIL. CALL A SERVICE TECH
Error Code 11 indicates an ignition failure. Check that the gas supply is turned ON. Switch the heater to STANDBY and the ON again. If the burner doesn't light or you continue to have a problem contact your Rinnai dealer.
Hope this helps you and thanks for choosing FixYa. Cheers ...
There is no pilot light on this model. An 11 error code tells us that there is no gas supply to the heater. Could be a bad gas valve, dirty igniter, gas got shut off somehow, dirty burner, etc... All you can do is make sure the filter is clean, a technician will need to open it up. Sorry.
A low to loud vibrating noise is an indication of an Air /Fuel imbalance . When you flow more water , does the noise become louder ? if so , have a service technician check for pproper incoming gas supply . The requirements are located on the left hand side of the Rinnai unit . There will be a minimum/maximum specification.
Another issue could be the burners being "dirty" and needing to be cleaned .
Also investigate the venting and make sure all joints are sealed properly and the venting is sloped correctly . If you have your installation manual , please refer to the venting section in regards to usage of a condensate collector . This can be a cause of noise .
There is a clear vinyl hose running from the bottom of the heat exchanger to the front of the gas valve . Please inspect this hose for any moisture or signs of staining . This can lead to issues with the gas valve . It must be determined where the moisture is coming from (See previous comment about Condensate collector !) .
The cold water solenoid valve usually has nothing to do with this type of noise .
As far as yourself being able to repair the unit ? I have no idea of your experience but a qualified licensed service technician should be used as this is a gas fired appliance and as such is subject to huge liabilities when being repaired .
Have them call Rinnai Tech Support while on site for any assistance needed.
You shouldn't have to "put upo " with any noise issues . The Rinnai ujnits run at 49 decibals (about the same level as a conversation .
Good Luck !
Short circuit on the low voltage side of the wiring (12V) This will show as an immeadiate error code 12 befoe the thing even tries to light.
Faulty earth on the low voltage side shows same as above.
A faulty gas regulator or partial blockage of gas supply that allows the unit to fire, but will not maintain sufficient gas supply to keep it alight. This will happen after it has lit, maybe erratically with the occasional error code 11 if you try and re-light immeadiately.
The error code 12 normally refers to a flame failure/front flame rod did not sense any heat or ignition.
If you have turned off the heater and the message again pops up, it could be because of following things:
Flame rod couldd be bad
Could be possibilities of carbon being stuck.
A dirty burner or losse wire due to which the flame is not getting on burner quickly.
This unit has a diagnostic error code recorder. To play back your error codes, with the unit off, push the up arrow, down arrow and economy button all at the same time and hold for 3 seconds. Record each number that lights up. In your owners manual or on rinnai.us there is a error code guide that may help. Or post the error codes on Fixya and I can give you some pointers.
Error code 12 is a genaric "Flame Failure" code. I suspect that the flame is not hitting the flame sensor or that the sensor is bad. You will need to get to the sensor located on the far left hand side of the unit. If you have the owners manual, it's part #123. Remove it and clean it off. Make sure it is placed back in the heater properly aligned and all the way in. Then try and light it. If it does not stay lit, it may need to be replaced but check out the burner tray for debris not allowing the flame to travel all the way to the sensor. You will have to remove many parts to get to the burner assembly.