Help wanted with CombbiE boiler not starting on gas

[guerdeval]

What diagnostic flash code are you getting?

What diagnostic flash code are you getting?

Hi, thanks for that, It’s been left overnight and just tried to see the lights and it seems to be working on gas and all 3 lights are on, hope they should be but nothing flashing at the moment, I will shut it down and try it on electric shortly but at present it’s kicking out heat

 

[guerdeval]

Will do ,thanks Gordon ,when it gets light

Hi Gordon, it’s a Combi (E) CP ,it’s running again on gas, first time I’ve heard the start up sequence on this trip so I’m going to shut it down on gas and try it on mains, rog

 

[guerdeval]

So there is a sequence for the lights on the PCB, there is a green,orange and red, after it stops there is a 5 second gap then the red light will flash a certain number of times,mine is 5 short,2,log,1 very short and if you call Truma they can identify the problem and my problem is with the FAN and it’s a dealer problem to sort out, might just need a clean if I’m very lucky but not hopeful, anyway, thanks for everyone’s input , Rog

 

[Sharon the Cat]

It would point to a power selection issue. Either control switch possibly which are linked together with a short data cable and then another long data cable down to the boiler. I have had to change my long data cable in the past. They are just chea RJ45 cables if needed. Dont buy expexive Truma cables

Complete deviation from the subject, but I just tried blowing your avatar off my monitor!

 

[witzend]

When mine wouldn't start it was that the exhaust fan wasn't working its in the bottom of the heater when you switch heater on it runs for a time to clear heater of any explosive mixture before trying to ignite the heater.
The start up sequence You refer to !

 

[Fazerloz]

Complete deviation from the subject, but I just tried blowing your avatar off my monitor!

Your not the first and I suspect not the last. Just don't squash it.

 

[colinm]

It would point to a power selection issue. Either control switch possibly which are linked together with a short data cable and then another long data cable down to the boiler. I have had to change my long data cable in the past. They are just chea RJ45 cables if needed. Dont buy expexive Truma cables

I've had to 'wriggly' the connections on ours to make better contact.

 

[guerdeval]

So, was it really this simple, got home today and removed the fan cover to ascertain if the fan replacement was within my skill set and it was full of dust and crap, so I used a sofa paintbrush I keep to clean out my vents to brush it all out and it’s been running on gas for over an hour, yet to try electric but I think I may have saved a few bob.

 

[JQB]

If you can see the led on the control card the # of flashes will give the fault code. When you say nothing happening except flashing red is it selected on the control for gas and not elec and does it make any attempt at going through the start sequence.

Happened to us, the regulator allowed thru enough gas for the hob but not the truma combi. With hob lit attempting to start the truma resulted in both stovetop burners goiing out/ almost going out.
Dirty autogas bought in Norway resulted in us having to replace the expensive truma regulator.

 

[Fazerloz]

Happened to us, the regulator allowed thru enough gas for the hob but not the truma combi. With hob lit attempting to start the truma resulted in both stovetop burners goiing out/ almost going out.
Dirty autogas bought in Norway resulted in us having to replace the expensive truma regulator.

Get a gas filter on before the gas reg it stops the oil in the gas getting to the reg, In the past I have had oil coming out of the reg.