Question about Rinnai Heating & Cooling
Error code 99 on rinnai propane heater
I am not an expert. this is how i fixed my rinnai code 99. my rinnai 100 4f would run for few seconds then the red light would continue to flash. code 99 would come up.i took the unit out of service. i notice that the fresh air hose had two very small hoses located on it's elbow had been switched around when i took it to be serviced. the unit worked well. how ever. i changed my mind when i realized the service was not need. anyway the two small hoses on the elbow one office is larger than the other and they must be put on the correct one,i switched them around the unit flamed up. and now i have sweet heat again.no code 99.
Posted on May 24, 2017
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Posted on Jan 02, 2017
If you are just going for heat only just connect the t_stat at these setting red wire R white wire to W green wire to G
Now the heater you can go to the gas valve or if it has a circuit board go to Red to R and white to W Green to G. Green is optional you just need two wires hooked up. You will see on top of the gas valve three connections the ones marked th are the ones you need.
Posted on Nov 26, 2008
SOURCE: my rinnai 556fa propane heater
I had the identical trouble with my Rinnai 431F just now & read the unanswered posts.
I checked my intake & exhaust & found them connected & intact then went out to check the exterior vent assembly. The "bell" or dome was almost entirely clogged with ice.
I suspect the 60 - 76 lights flashing means insufficient combustion air.
Anyway, I took a hair dryer to it & in 10 minutes it was working as well as ever.
This won't help you October posters but if anyone else has this problem in the future I would start with the outside vent assembly. Get a good look right up inside because I would have missed this ice if I didn't get up close with a flashlight.
Here's a good source for manuals too...
I'm going back to bed.
Posted on Dec 22, 2008
SOURCE: flashing code 99
Error code 99 has to do with the flue pipe being blocked. You could have ice or frost on the exhaust or air intake. This reduces the combustion air to the unit which in turn stops the fuel flow.
Posted on Jan 10, 2009
rinnai has a technical bulletin out on this condition #28. It instructs the technician to adjust the gas pressure. You can get a copy of this bulletin by contacting rinnai at 800-621-9419 (US). or at rinnai.us
Posted on Feb 02, 2010
What is the outside temperature? If it it is below freezing, you might have a frozen pipe. Using a plumber torch heat up the pipe, if it works, replace the insulation using a heavier layer.
Posted on Apr 04, 2010
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