Poor Performance of Wallas 1800 heater

catmandoo

catmandoo

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I inherited with my boat a Wallas 1800 paraffin heater . Apart from the first year of use I have never been able to get it to light. Tried replacing wicks , filter on end of suction line and also checked recycle line as well to get free drainage back to tank .. Even when It was working heat input was not up to much

Anybody had similar problems and had any success in resolving them ? If so I would like to know . I hate having an asset that doesn't work even if usage is minimal

i have recently bought a service kit to give it another try and would like to be forearmed
 
i had one new in the mid 80s, when & i do mean WHEN it worked it was very good but prone to the PCB going like Homer`s beer, Duff. in hindsight i would never have bought it.
i realise that is not much help to you in sorting your problem.

send David 2452 a PM he might be able to help you.
http://www.ybw.com/forums/member.php?172-David2452
 
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One thing Wallas is very sensitive to is the fuel joint at the heater, make sure it is good and tight, bendy is quite right, despite their supposed reputation for low power consumption they draw a lot more and for longer at start up than the competition, if you only use for short periods the power used can actually be higher, used for longer periods the lower power when actually running does have a cancelling effect and eventually a positive benefit. If only run for a couple of hours at a time the (newer) Webasto wins out above them all for consumption.
 
I have this type of heater and as the OP said you require a very good supply to to enable the heater to start. You should be able to hear the fuel pump "ticking" at about one tick a second. If not then the pump may be "gumbed" up. (this happened to mine) . It is possible to remove the pump and clean it. I have a 32 ft yacht and it provided a comfortable temperature in Cardiff on evenings when the temperature was well below zero. If you have to remove it be very careful of the burner output pipe as it is very fragile.
 
I've got one but not used it much. Previous owner's tip was to start engine first as battery at languishing voltage couldn't reach the 13volts plus needed for it to fire up.
 
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