Truma heater blower system

Don't know about your "Truman"? System but with our Aldi one you have to set the required temperature above the ambient temperature for the heating and it's pump, or fan in your case, to work. 

I think we need to know what model of Truma, Tiger, and what controls you have. Older models had very different controls to newer ones.

Have you read your handbook?

+1 and/or post a photo of your control panel?

Yes. Our Truma heating system is very simple to use. In a 2001 Autosleeper MH. We need to know a bit more about outfit👍

Only thing that springs to mind with me, is all the pipe work for sending hot air to vents connected?

what do you mean everything heater wise is fine? You have heat? As said by NTH the fan switches off or slows down when the set temperature is reached. Did it work when your LV was heating up?

PCB board  that  sits below the fan control speed setting knob is faulty  .We had the same problem where the fan was not working  

Assuming your Truma unit has one, you could always try the reset button, sometimes clears obscure faults. Be careful who you get to diagnose and fix your fault, my experience is that too many generic caravan/MH dealers don’t have the skills to fix complex faults on these units. 

The dealer did not have clue when our Truma blown air failed to work they did have a blind stab and fitted a new PCB but that did not work  so under warranty we booked it in at Truma in Derby, The engineer plugged in his gadget similar to the one used  in cars up popped up a list of faults from which he surmised it was the combustion fan  we were shown to the staff canteen a couple hours later the part had been fitted and tested 

Ideal. I eventually got an intermittent fault fixed, but next time I’d go straight to the Service HQ at Derby even though it’s nearly 300 miles away. Hopefully you didn’t get charged for the PCB? Replacing stuff to see what happens can get expensive!

I am puzzled when you say it works but just no fan. I imagine you don't have the CP system display as that would flag up a fault code? Some Truma heaters work on convection alone (mainly the older variety)  but this is mainly stand alone heaters with no other air outlets so they won't have a fan. My Truma Combi stopped working because the fan wasn't working so couldn't distribute the heat and that was a PCB replacement. As others have said we really need to know the model you have otherwise we are all doing a bit of guesswork.

David