When the temp drops below 10degrees our Rinnai

Code 11 is that the unit is trying to light but does not sense a flame after 5 seconds. Usually means you have run out of gas if you are bottled gas. Check your bottles are turned on if you are on LPG, you might need to change over manually. Have you anything else on gas?

check to see if you have a blocked line on the hot water side

is this a vented or non vented unit? have you checked the rinnai distributorship? call Adirondack Hardware in Keeseville NY. They have parts for Toyostove, Monitors and Rinnai heaters. Their staff are very well versed in all kero and propane heaters.

The fitting on the back of the unit is 1/2" MPT. Wouldn't suggest messing with it if you are not familiar with propane or natural gas. Make sure the unit is set up for LP if you are going to use a portable supply tank. These units are very reliable. Check all fittings with a diluted soap and water solution before turning on the unit. If it is not connected to it's venting system, you would have a forced induction source of ignition if you had a leak in your piping. These units should only be installed by a licensed plumber or gas fitter, one simple error could allow carbon monoxide (CO) into your house

Typically you will be able to bend the gray hose to make an elbow or untwist the elbow off of the factory supplied air intake hose and use that.

Do you have the Economy button on? If so, and you have a large space to heat or the outside temp is very cold the unit may not be able to keep up. If this is the case the stove runs forever, trying to reduce the temp by 2 degrees every 30 minutes. This may not work for your space and outside temp.

Your ideas about the intake and exhaust are not quit right. There is a fan that pulls air from outside over the outside of the exhaust pipe (to preheat it). This fan actually pushed the combustion gasses all the way out the exhaust. The exhaust exiting should be a little hot. In very cold temps, frost can build up around the air intake, which is right around the exhaust pipe. If you see this you will need to keep it clean. It is a good idea to look at the exhaust everyday when it really cold.

Good luck,

Tom Hawkins
Bethel, Alaska
[email protected]

You can adjust the position of the room air sensor found on the back of the unit between the heater and the wall. It is a black rubber bulb with yellow wires. There is a few inches of extra wire you can extend higher to get a more accurate reading of room air. While you are back there, check for drafts that will give you false readings.

Ventless heaters such as these have an oxygen depletion sensor that monitors O2 levels at the burner and shuts the unit off if it drops below a certain percentage (assuming that there will be carbon monoxide production). Check your owner's manual for any requirements such as a window or door needing to be open while this heater is in use.
There also is the possibility that there is water in the regulator of your propane line (if it is outside) that freezes and inhibits the regualtor's function.

Behind the unit near the floor level, is a yellow wire with a black bulb at the end. This is the actual sensor for returning air. If there is cool air infiltrating the area where it is located, it will keep the unit running until the return air reaches temperature. You could also have a bad sensor but highly unlikely. Make sure there is no air infiltration influencing the sensor. Also, you can unclip the sensor and pull out a few more inches of wire to locate it higher up away from the floor. Tie it up with a wire tie.

Rinnai it testing a remote thermostat but as of yet, there is no plans to offer one.

the rinnai is like a monitor. just unplug it, wait five min and plug it back in. then radjust your temp set point and it should pick back up. when there is a power outage the led-s flash 88:88