Question about Rinnai RHFE-556WTA Direct Vent Heater NG Air Conditioner

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Rinnai 556F Not Exactly and "Energy Saver"...

I have a Rinnai 556F "EnergySaver" unit in my apartment. The problem is the internal thermostat, which is the dumbest thing I've ever heard of for a heater that must be installed on an outside wall. The short version of what's happening is, if the temperature is 32 degrees or less outside, the Rinnai, when kept on the 60 degree setting, never turns off. The end result of that is my apartment is 75 degrees and I'm burning through over 125 gallons of propane a month at a cost of over $400 for a small apartment. If it's over 32 degrees outside the unit barely works at all. If I look in the back of the unit, is there a way I can see the thermostat? Can it be moved to a wall above the unit or can I install a seperate thermostat altogether?? Thanks for any help!

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Raise the thermistor. It is a black rubber probe located on the back of the heater close to the coldest spot in your home, the floor. Raise it a few inches. To do this you will need to unhook it from its holder and open the front of the heater to unravel the extra length of yellow wire.

Posted on Feb 20, 2009

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Posted on Jan 02, 2017

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Rinnai DV Propain Heater 556F


Sounds like the relay might be going bad and needs to be replaced

Apr 10, 2008 | Rinnai EnergySaver 556 Air Conditioner

1 Answer

How to install


Unfortunately, the installation of one of these units is not quite as simple as 1, 2, 3.

So, I am providing a couple links on the installation process. You can download and print each one.

The first is the Flue Installation Guide.
http://www.rinnai.com.au/images/stories/operating_instructions/Heating/Energysaver/CI_ES_Flue_Inst_Manual.pdf

The second is the Operation Guide, which also deals with proper installation.
http://www.rinnai.com.au/images/stories/operating_instructions/Heating/Energysaver/CI_ES_Flue_Inst_Manual.pdf

The third is the exploded parts view & parts diagram, Which you may need in the future.
http://www.rinnai.com.au/images/stories/operating_instructions/Heating/Energysaver/CI_ES_Flue_Inst_Manual.pdf

I hope all of this information will help you properly install the unit.

Jun 02, 2011 | Rinnai EnergySaver 556 Air Conditioner

1 Answer

I have a rinnai energysaver 556f heater and the "On" buttons keeps flashing and it feels like it's blowing cold air. The "LO" button keeps flashing as well. What does this mean?


It is telling you that there is an error code stored in the EPROM. Press and hold the Economy button and the Up and Down arrows for 5 seconds. Get ready to tell an assistant the codes as they pop up. You may have to do this a few times to get them all. Repost the error codes here on Fixya if you don''t have an owners manual to interpret the codes.

Feb 25, 2011 | Heating & Cooling

1 Answer

My tank says I have 32 gallons left but the heater won't work (rinnai 556f). It turns on for about 15 seconds and the light on the power button turns red and starts blinking. What does this mean?


If you hold down the economy button and the up and down arrow buttons for 5 seconds the unit will start an error code display. Get a helper and yell out the numbers when they start blinking. Post the error codes and we can help you

Dec 23, 2009 | Rinnai EnergySaver 556 Air Conditioner

1 Answer

I have a Rinnai Energysaver 556F


The heater will have some error codes stored in it. To retrieve them get an assistant to write down the codes as you see them. They come quickly. OK to get the codes, push down on the Economy button and the up arrow and down arrow at the same time. Hold for three seconds. It will take three fingers to do this. Once you get the error codes, look in your owners manual to diagnose.

Nov 21, 2008 | Rinnai RHFE-556WTA Direct Vent Heater NG...

2 Answers

Rinnai EnergySaver 556F Heater flashes


I'm picking up a faint propane scent when the heater is completely turned off. When I turn the heater on it lights fine so I don't suspect it's the pilot light. Is this an issue with the installation of the fuel line, or could it still be the pilot? Any ideas on troubleshooting the source?

Nov 10, 2007 | Rinnai EnergySaver 556 Air Conditioner

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