Diesel Heater Help! (1 Viewer)

Jul 26, 2019
416
473
Devon / Cornish border
Funster No
62,726
MH
Mobilvetta Kimu 122
Exp
2019
Thoughts and advice sort.

Moho has diesel heater for habitation warmth, Moho has two leisure batteries, both reasonable new and holding good charge.
Arrive at destination, batteries have had a good 'journey charge', heater will ignite as long as we do not have more than one light on (Not LED)
Off grid, solar keeping batteries around 12V, so everything else working fine, but by day 3 (Sometimes day 2) Diesel Heater fails to ignite, when I watch the control panel, leisure batteries drop 1.5V - 2V initially during first few seconds of start up

It seems that they isn't enough battery juice to get the heater going.

All fine if on EHU.

Is this normal for these heaters, do others experience the same issue?

I'm OK with a cold van but SWMBO feels the cold and we are also thinking of heading to Norway way at some point so need to make sure we are warm.

Thanks in advance
 
OP
OP
Rjcamper
Jul 26, 2019
416
473
Devon / Cornish border
Funster No
62,726
MH
Mobilvetta Kimu 122
Exp
2019
12v is nearly flat sounds like batteries have had it. If they have just been charged without a load they should be sitting 12.7 to 13v
They sit at 12.7 - 13+v after a journey, but drop after some use when parked up, getting back to full charge if its a nice sunny day.

It happens when we have a cloudy / rainy day and not enough charge is getting back in from the solar panel to get back to 'Full charge'

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Nov 3, 2013
3,106
8,872
Portugal
Funster No
28,868
MH
Fiat Ducato Auto Wildax
Exp
C/van since '73 .M/h.2009
Hi.
They are/were a bit power hungry. Like the cable distance check.
Tea Bag

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Jan 2, 2023
48
71
Cheltenham
Funster No
93,141
MH
Swift Bolero 684FB
Exp
Since 1998
I had a diesel heater on my old Autocruise and had similar problems to you I had the cables from the battery to the heater upgraded to thicker ones this made a big difference
As has already been mentioned it is the initial start up that uses the most power ( Glow plug on ) once the heater fires up the demand on the battery is much less my heater was made by ebersphcer combitronic model worked very well

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OP
OP
Rjcamper
Jul 26, 2019
416
473
Devon / Cornish border
Funster No
62,726
MH
Mobilvetta Kimu 122
Exp
2019
I had a diesel heater on my old Autocruise and had similar problems to you I had the cables from the battery to the heater upgraded to thicker ones this made a big difference
As has already been mentioned it is the initial start up that uses the most power ( Glow plug on ) once the heater fires up the demand on the battery is much less my heater was made by ebersphcer combitronic model worked very well
Thanks, yes it's the initial start up.

Will also have a look at the connectors as have had a few dodgy ones on this moho
 
Apr 3, 2018
3,221
8,752
Funster No
53,151
MH
PVC
Exp
1995-2004 & 2017》
they only use high current at start up so start with the engine running
Do diesel heaters not cycle on and off on a thermostat?
If so this answer will not work unless you start engine everythime heater tries to relight..
 

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