Rinnai Rice Cooker Repair – Part 2: Replacing the Thermal Sensor | eTundra

Hi. I’m Chris Tavano for Tundra Resturant
Supply. In this video we’re going to show you how
to troubleshoot some common setbacks and easy maintenance repair for your Rinnai
Commercial Gas Rice Cooker. The last common setback that you’re going
to experience with your Rinnai Commercial Gas Rice Cooker is actually how the rice itself is cooked. Whether it comes out overcooked or undercooked, it really comes down to your thermal sensor
itself. Again, that’s this piece in the center with
the spring. The reason why this is so important is because
this is run by an induction magnet that actually cooks your rice from the bottom
of this pan. Always be sure first and foremost that this
surface is spic and span clean as well as the top of your thermal sensor
itself. From there, if you see any type of wear and
tear from the daily grind and it is clean but you see the impression
of the magnet inside, that means your thermal sensor needs replacing
anyway. First, you’re going to turn the whole machine
upside down. The screw right here, the set screw. Take
that right out. First thing first, is you’re going to want to release the lowest
washer on the plunger arm of the thermal sensor from the operating arm of the base. What I did is I pushed down on the spring
of the plunger on the thermal sensor itself to get this pin out of that hole. From there, this plunger should just be able
to detach right from the operating arm and it will sink right in to the thermal sensor
itself because it is a magnet. Nest, we need to remove this tricky littler
securing spring of your thermal sensor. Pretty much you see the hoop in the back, you’re going to push away from the center and it should just pop right out of that hole. From there, you’re going to give it a little
90 degree twist so that way the base of it can come out the
bottom. Take note of the positioning of the feet on
your thermal sensor and where there are in relation to the housing
basis. For instance, this one foot on the thermal
sensor has an angle cut into its base of its foot. Take note of that because when replacing this
later you’re going to want to line that one special
foot up in the same direction that you just took that
securing pin from and just slides right out from there. This is the thermal sensor and this is pretty
much what drives the cooking of the rice. The cooking of the rice has nothing to do
with the amount of weight or the amount of water you have. Strictly, it has to do with heat. Thermal means heat, this is essentially a
heat sensor. That’s how it’s going to regulate the
temperature of the cooking of your rice. This is your thermal sensor spring. Keep in mind, this is actually tapered so it means one circumference is a little
bit smaller than the other circumference. Meaning, it’s only going to fit on your
thermal sensor one way. Keep in mind if you put this on and this ring
can get above it, you got it on backwards. You have the big end at the top. What we do want is the small end at
the top. Now it fits flush, you can’t quite get it
over that top lid. Take note of the shape of the base of this
one foot compared to the other two. This angle to foot is going to be positioned
in the back corner where we release that securing spring. Actually, replacing this securing spring is
much easier than it looks, much easier than it was coming out. Big thing to take note of is this little L-shape
in the end. It needs to go through this hole and down
and into this slit that is positioned next to that angled foot
base that we’re speaking of earlier. Then once that’s in place there we’re going to focus on pushing that little
hoop all the way to that back little slot that we took it out
of earlier. Once you get that spring hooked back up to
the base in both spots, you get the plunger from the sensor again. Remember, we have this one slight pin that
needs to go in that hole. However, do not just want to put it in there
like this. That is not secure. What you’re going to want to do is push
that first washer with that pin down on the spring and get that to sit right
in here. Now, do you see how the arm as well as the
plunger are securely together in between those washers? Now, it’s just a matter of rotating that
pin right into the hole. It’s just a matter of ease to get this piece
back screwed into place. There you have your thermal sensor replaced. I’m Chris Tavano for Tundra Restaurant Supply and that’s how you diagnose and perform
some common repairs to your Rinnai Gas Commercial Rice Cooker. Here’s to a better mise en place!

9 thoughts on “Rinnai Rice Cooker Repair – Part 2: Replacing the Thermal Sensor | eTundra

  1. Excellent guide. Very well explained. I was just about to pay someone to fix this for me had I not known you guys at tundra restaurant supply had this video. Makes me glad I buy my restaurant supplies at etundra!

  2. Aloha from Hawaii. My dad has a Rinnai commercial gas rice cooker. He has 2 pots for this cooker. One pot cooks rice just fine. The other somehow is not communicating effectively with the cooker. The cooker does not turn off and resulted in some seriously burned rice. My dad still uses this defective pot but montitors it closely and turns it off manually when the rice is cooked. He believes that the removeable piece at the base of the pot is the problem. It is quite corroded. Do you think this could be the problem and is this piece available for purchase?

  3. Hi, your videos are excellent and the explanation very good, I need to know how to adjust the thermal sensor and how to know when it is bad, many greetings, greetings from Costa Rica

  4. I struggled with 2 Rinnai gas rice cookers I bought new. They would prematurely shut off and we would have to keep turning them back on. We bought new thermostats, changed the gas lines, changed the gas hose, even had our meter upgraded. Nothing worked! Then one day I decided to read the manual and saw a section in the manual about commissioning the rice cooker. There in we found the specs for adjusting the ATPP. You will need a manometer to do this, you have to remove the drip tray and one of the panels on the underside. Then you have to measure it with the flame going. I just had my HVAC guy who has the tool and knows how to do this adjust it for me. Our measurements showed that we had too much gas pressure. So we backed it back down. Now this rice cooker works as it should. It was so inconsistently working before, sometimes we had to restart it once, twice, several times and it just never made sense. Now it works on the first try. I hope you find this comment before you waste all the time and money I did when I should have just RTFM.

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