I have an error code that won’t go away on my Truma screen. How do I clear it?
TOWB group member Rick Filcoff has shared this document compiled from information provided by Truma service.
In most cases an error code will clear itself once the issue has been resolved, but if it doesn’t . . .
Why not set the Truma to heat the van and water at the same time?
Many T owners have reported a situation where the Truma fan kicks in to high gear and blows a ton of hot air throughout the van. It’s pretty annoying. The common element when this has occurred is that they had the Truma set for both heat and hot water and the Truma decided that it (the Truma) was overheating so it kicked into an exhaust mode to cure the problem – and sometimes throws an overheating error code, which clears once the unit has cooled down.
Simple enough to avoid having this happen – don’t run heat and hot water at the same time.
I AM GETTING A 212 CODE ON THE TRUMA SCREEN WHILE TRYING TO USE THE TRUMA ON LP / GAS. NOW WHAT?
1. A 212 code usually means that there is no LP getting to the Truma.
Both the inside and outside LP switches need to be turned ON in order to use LP inside the van.
In addition, the LP solenoid switch on the top of the Truma itself needs to be turned ON in order to use the Truma on the LP/GAS mode.
If you have an LP stove and if you have LP at the stove and it will run for a long time but the Truma will not work on LP then it’s POSSIBLE that you have an issue with the regulator, usually cured by replacement of the regulator. Note that the stove is much less particular about the gas pressure available so just the fact that the stove works doesn’t mean that the regulator doesn’t need replacing.
Sometimes the 212 code can be cleared by re-setting the Truma itself by using the re-setting the Truma instructions elsewhere in these FAQ’s.
2. A few people have learned that the 212 error can be triggered by issues with the intake or exhaust air connections/lines to or from the Truma, most frequently due to one of the clamps holding the tubes to the Truma having become loose and sometimes due to a kink/blockage in the tube.
I am getting a W45H code on the Truma screen while trying to use the Truma on electric. Now what?
That code usually means that there is no 120v power coming to the Truma while you are trying to use one of the electric modes for room heat or hot water.
1. Make sure you have 120v power available in the van (either plugged in to shore power or running the generator – or the inverter is on in an “L” model). An easy check for this is to look at the clock on the microwave oven – if it is lit up you have 120v power in the van.
If you don’t have power in the van – figure out why . . shore power breaker tripped? Circuit breaker on generator tripped? Main breaker in the van breaker box tripped?
2. If you have 120v power in the van with the microwave clock showing but not to the Truma (there should be a little electric plug icon showing in the lower right hand corner of the Truma screen) it’s usually because:
A. the breaker for the “water heater” in the van circuit breaker box is tripped” or
B. the GFCI outlet that the Truma is plugged into needs to be re-set by pressing the re-set button in the middle of the outlet. In a Travato K or KL this outlet is under the driver’s bed behind the vent near the bathroom – although in some 2019 models it’s further back and the top of the bed must be removed to reach it. In a Travato G or GL this outlet is under the bench seat at the dinette. Re-setting the GFCI usually clears the issue.
NOTES:
The GFCI outlet will only re-set if there is 120v power going to the outlet.
If there is power in the van and to the Truma and you still get the error code you may need to re-set the Truma itself. There are instructions for how to re-set the Truma elsewhere in these FAQ’s.
The GFCI outlet was only installed in 2017 – 2020.5 models and then Truma no longer required WGO to install a GFCI outlet. You can safely replace your GFCI outlet with a standard 20 amp outlet if you want to.
I received a letter from Truma saying not to use compressed air. Is it okay?
Per Truma and Daniel Senie (author of the Truma Primer):
Is there a Truma Operation Cliff Notes Cheat Sheet Version
Yes – right here:
For Heat. A. Press knob – Turn knob to icon for power source – press knob – turn knob to selection to the one you want (EL1, EL2 for electric only, Mix1 or Mix 2 for electric with LP assist. LP for LP only) – press knob to set. B. Turn knob to camper icon – press knob – turn knob to temperature setting – press knob to set. C. Press the “return” button on the left of the pad (or do nothing). DONE. That’s all there is to it.
For Hot Water turn off the heat if it is on, Then. A. Same as above but LP is best. B. Turn knob to thermometer icon – press knob – turn knob to desired setting (generally HOT is enough) – press knob. C. Same as above.
Actually do not use BOOST and don’t try to heat the van and water at the same time, do one or the other (explained in notes below)
That’s all there is to it. No mystery, Turn press, turn press.
Here are the heat levels you will get on each setting:
• Electric only: E1 (850 watts) = 2,900 Btu.
• Electric only: E2 (1,700 watts) = 5,800 Btu.
• Gas only: Burner in stage one: 7,500 Btu.
• Mix 1: 7,500 Btu Gas + 2900 Btu Elec = 10,400 Btu.
• Mix 2: 7,500 Btu Gas + 5800 Btu Elec = 13,300 Btu.
• Gas only: Burner in stage two: 14,300 Btu.
So gas mode puts out the most heat, but Mix 2 is a close second and only uses about 1/2 as much gas, in theory. Electric only, even in E2, only puts out 5,800 Btu, which is not really a lot, just slightly more than the standard 1,500 watt space heater or large hair dryer, but sufficient for cool weather.
When calling for a Mix mode keep in mind that the Truma brain will prioritize LP until the temperature setting is reached and then try to maintain the temp with El. So most of the time there really will be little advantage to using a Mix mode, just use Gas or El.
NOTES:
You CAN use the Truma for heat even when the system is winterized and the Truma water tank has been drained without harming anything.
To use LP modes make sure the LP switches are on both inside and outside of the van. (There is also an LP solenoid switch on the top of the Truma that needs to be on.)
To use EL modes make sure you have 120v power working in the van (if the lights are on at the microwave oven you have power).
If things are not working you will see a caution triangle at the bottom of the Truma screen. Turn the knob to scroll to it and press the knob and an error code will be revealed. The most common ones are a 212 code indicating an LP issue at the Truma or 45 indicating no 120v power at the Truma. Check the FAQ’s for 212 or 45 to learn more about those issues.
Many T owners have reported a situation where the Truma fan kicks in to high gear and blows a ton of hot air throughout the van. It’s pretty annoying. The common element when this has occurred is that they had the Truma set for both heat and hot water and the Truma decided that it (the Truma) was overheating so it kicked into an exhaust mode to cure the problem – and sometimes throws an overheating error code, which clears once the unit has cooled down. Simple enough to avoid having this happen – don’t run heat and hot water at the same time.
Where can I quickly find most of the Truma Error Codes?
They are on page 13 of the Truma manual – – or, right here.
How should I decalcify the Truma Combi?
Truma tells us that this should be done “occasionally” and:
The appropriate product to use is vinegar essence or citric acid.
Put it in the fresh water tank, the mixture being : 1/3 product to 2/3 water.
Have it go through the water system, allow it to work over night and then rinse the system with fresh water.
(EDITORIAL COMMENT – The Truma water tank is only about 2.5 gallons so you don’t need to make a mixture to fill your entire water tank. Empty the tank and just make about 5 gallons and that should be enough – maybe even less.)
What is Truma error code W0H?
It is basically when a fault or warning has occurred but the Combi has deleted the fault itself without the customer’s input.
This could have been something as simple as the 12v power to the coach being turned on and off too quickly a few times.
The customer should just simply do a reset at the CP+ to clear the issue.
Which Truma heat setting should I use?
Which heat setting you use will depend on the outside temperatures and the temperature you are trying to achieve.
Here are the heat levels you will get on each setting:
• Electric only: E1 (850 watts) = 2,900 Btu.
• Electric only: E2 (1,700 watts) = 5,800 Btu.
• Gas only: Burner in stage one: 7,500 Btu.
• Mix 1: 7,500 Btu Gas + 2900 Btu Elec = 10,400 Btu.
• Mix 2: 7,500 Btu Gas + 5800 Btu Elec = 13,300 Btu.
• Gas only: Burner in stage two: 14,300 Btu.
So gas mode puts out the most heat, but Mix 2 is a close second and only uses about 1/2 as much gas. Electric only, even in E2, only puts out 5,800 Btu, which is not really a lot, just slightly more than the standard 1,500 watt space heater or large hair dryer, but sufficient for cool weather.
Do I need to keep a window open when I run the Truma on LP?
This response directly from Truma:
“The Truma Combi is a sealed combustion furnace which means that all the exhaust gas is vented outdoors. It is not necessary to leave a window open during use.”
How can I reset the Truma itself?
Is there a video on how to use the Truma Combi?
Here is a link to a video put out by Truma. https://youtu.be/kiQ0Jw8nwjs
I was winterizing and got anti-freeze in the Truma. Now what?
The Truma people said that draining the tank sooner would be better but won’t hurt anything until using the heater. Heater will crystallize fluid.
Flushing would be best but not if it requires flushing whole system and starting over.
My Truma won’t run on gas but the burners on my stove are working. Any advice?
First, make sure this really is a Truma problem and not a gas problem. There can be enough residual gas in the lines for your cooktop burners to work with the solenoid valve closed.
If you’re sure your gas is on, then your Truma might be in the “off” position. Find the switch in the picture and check.
If this isn’t the problem, call Truma. They provide excellent technical support over the phone.
My Truma won’t run on gas but the burners on my stove are working. Any advice?
First, make sure this really is a Truma problem and not a gas problem. There can be enough residual gas in the lines for your cooktop burners to work with the solenoid valve closed.
If you’re sure your gas is on, then your Truma might be in the “off” position. Find the switch in the picture and check.
If this isn’t the problem, call Truma. They provide excellent technical support over the phone. 1 (855) 55-TRUMA
How do I get a hot water shower in the Travato?
This is thoroughly addressed in the “Truma Primer” document under the heading, “Your First Shower”. Remember, it isn’t possible to take a shower like you would at home. In the Travato you need to take “navy” showers. Quickly get yourself wet all over as soon as you turn the shower on, and then turn the water off while you soap up. Turn it on again to quickly rinse off.
Can I run the Truma to heat my coach without water?
The Truma Combi works perfectly for heating your coach when it is winterized with no water in its water tank. On the control panel, select the heat temperature you desire. Do not request the Truma to generate hot water. If you do, it will sense the water tank is empty and will shut down with an error code. This will not harm the system.
What are the power sources for the Truma?
The Truma gets power from Liquid Propane gas, from 110v electrical power, or a combination. The Truma uses 12 volt power for control circuits and blowers only.
The Truma has several heat source modes:
- GAS: propane
- EL1: single 110v heating element
- EL2: two 110v heating elements
- MIX1: gas burner on low, plus one electric element
- MIX2: gas burner on low, plus two electric elements
The Truma will never, ever draw energy from your batteries to energize the electric heating elements.
I have loads of questions about my Truma…where can I go for answers?
We have a very informative and thorough resource called the Truma Primer, please read it over. It is a great starting point before asking questions about the Truma Combi in your Travato.