[euan78]

alright it hapens on cold mornings like today it wouldnt work fist thing then about 11 clockit fired up its happend loads of times i took it to my loca webasto dealer and they said it needed a new burner well the new burner is in and its still playing up my batt is fully charged also its driving me mad its only 8 month old any ideas what it could be cheers

[stevenpaulmatthews]

we are having the same trouble mate,its an undervoltage problem as ionics put it the webasto takes 4 volts to fire up not leaving much power left to get you through the day

we are in the process of wiring another battery into the loom 1 for the pumps and 1 for webasto

1 battery is not enough to power our thermopure, we put it on charge every night till 07:00am every moring and still cuts out most days

[richard jagger]

Replace you alternator with one that will charge more amps and put you second in tandem with your van battery.I had a camper van that needed a high anps just to turn on the sound system and that was how I solved the problem. My  camper was a V W with a35 amp alternator and I fitted a passat alternator that  charged 85 amps.

[euan78]

ive got the thermopure as well but i have 2 batteries in the back which are wired to the van battery my voltage sits at about 12.6 and drops to 12.3 when i turn the heater on ive had it for about 8 month and it was working fine till about 2 month ago at the same voltage which makes me think its not a battery problem

[btc]

I have the same issue with my Flame (Brodex) water heater.

As it only occurs in temperatues below -3; I am under impression that the cold fuel has a negative influence on the burner.

Before someone comments about the air temp(intake); the air intake is supplied from inside the van and I have experienced the problem despite having a heater in the van.

If it were a voltage issue, I would expect the unit to work when the van was running, but this isn't the case.