Truma boiler issues

[Danny Richards]

I have a 2008 Rapido with a truma combi boiler which has stopped working fan for blown air not blowing but free gas not lighting changed over bottles to see if that helps new regulator fitted last year with filters main board changed 2018 with new electric elements. Brain not computing duh.
Any help ideas welcome

 

[Winks]

First thing I’d go for is battery voltage. Ours went dodgy in the cold last winter and only fired up if I ran the engine to get battery voltage up. Ran ok after turning the engine off.

Cheers

H

 

[The laird]

Yeah low battery voltage for me as well as reg has been done

 

[Danny Richards]

Both the leisure batteries and starting batteries are on charge but will un plug and run engine

 

[witzend]

Are you hearing anything when you try to start boiler

 

[Danny Richards]

Slight buzzing sound then clunk the red light on control

 

[witzend]

Slight buzzing sound then clunk the red light on control

When its buzzing can you feel any air coming out of the heater outlets not like the blower just a slight draught this would be the expel air fan which clears the chamber before it ignites the gas if this fan doesn't run for a few seconds the heater won't light

 

[jeffmossy]

I will also go for low battery voltage , check the voltage at the boiler end plus all connectors are clean and pushed into place , also is it working on 240v ?

 

[RoaminRog]

Truma blown air needs 12.6v to fire up initially.

 

[TJBi]

Have you checked the LED on the boiler itself which flashes a diagnostics code?
See https://motorhomer.com/threads/truma-combi-red-flashing-light.43323/post-211604

 

[Deleted member 5729]

I had this last year. Found that when I removed the fan that it was chocked with debris. Because of this the thing would constantly lock out. Easy fix.

 

[dhall26]

+1 for voltage
I had a faulty fan, (which is easy to change) and it went clunk and then red light as it checks that the fan is running before it will light the gas.
But you need to check the led's to see the fault code.
David