Chinese diesel heater runs but no heat.

[Nomad]

Hi, any suggestions why a cheap diesel heater will run but not put any heat out??
Good battery, has been primed, makes all the right noises but does nothing.
It showed error E-06 once but normally no error codes.

I have 2 identical units. heater 2 works fine.

Swapping it out for heater 1 (same controller, pump, fuel) I get some heat out of the exhaust but no heat from the output.

Threads:
Heater blows cold

Diesel heater blowing cold

Not used for a couple of weeks, this morning it seemed to start fine. No error codes. After a while I did not feel any heat. Went outside, pump is silent. Just the main fan seems to be running. As I say no errors. Is there simple way to test the pump or maybe fix it. I understand it's quite a...

www.mig-welding.co.uk

There’s also a couple of threads with the larger suitcase size heaters, the one I have is more shoe-box size.

Any bright ideas ??

 

[winchman]

Facebook group for Chinese diesel heaters is good

 

[voipio]

Check that the fuel path inside the heater is not blocked. Try blowing some air into the fuel line connector. Does the glowplug work OK? Do both the working and non-working heaters draw similar amounts of current on startup? That might give a clue. Does the fan on the burner side move a reasonable amount of air through the heater?

 

[Barking Mat]

So, on start up glow plug working will pull heavy current.

Is the fuel pump ticking audibly ?

Some use wire mesh, some a pad, for diesel absorbtion, check that.

 

[qwakers]

if you are getting fuel and the fan is running, blow a airline into the combustion intake whilst it is trying to start. chances are if its coked up it will light and the excess air will fan the flame whilst also blowing soot out of the exhaust. itll likely light with a loud bang if you do that. ive done it several times, beats stripping the burn chamber.

 

[gaz1]

id test your electronic side of things before you do anymore

swap over the leads from one machine to the other then try as they could be a fault with your electronics that isnt showing up as a fault or code

if the machine starts to work then its your electronics control system that has become faulty

if the machine that was working no longer does then you have your answer once you swap back and it fires up again your back to normal

these machines are all basic with basic controls similar to an oil heater

 

[Nomad]

I'm using the same control unit etc to test both systems, the only thing I'm swapping is the heater unit itself.
Fuel pump etc is working fine and pumping for both heaters.
To me this says the problem is inside the heater not the control unit or fueling..

Both units were bought new a few years ago and both have alway worked well until one of them stopped giving out heat.
Thanks for the ideas, will try them and report back

 

[Barking Mat]

Check the glow plug with an ampermetric clamp, failing that it's the combustion chamber.

If you disconnect the outlet of the fuel pump is fuel coming out ?

 

[Nomad]

I'm visiting so very limited tools and no diagnostic kit, unable to measure amps draw.

Pump is making all the right noises and fuel is coming out. It works fine on 1 heater, not on the other.

 

[qwakers]

swap the glow plugs between them. but try my suggestion ^^ first.

 

[gaz1]

this will help you more

https://www.pfjones.co.uk/PFJ_towbars/PFJ-0035.pdf

page 27

2 wires to air fan
2 wires to fuel pump
room temp sensor wires the module is also the room temperature

 

[Bobtail4x4]

try here

Diesel Air Heater Fault Finding

Diesel Air Heater Fault Finding If your diesel heater will not start, please follow the steps in this document carefully. In most cases you will be able to fix it yourself, saving you time and money. The team at Dieselheat can also help you if following these steps doesn’t work. This fault...

www.dieselheat.com.au

 

[not done it yet]

I'm using the same control unit etc to test both systems, the only thing I'm swapping is the heater unit itself.
Fuel pump etc is working fine and pumping for both heaters.
To me this says the problem is inside the heater not the control unit or fueling..

Both units were bought new a few years ago and both have alway worked well until one of them stopped giving out heat.
Thanks for the ideas, will try them and report back

Were they bought together? Different models can use differing motherboards (inside the casing).

Faults can range from fan speed not being sensed, temperature sensor faulty, glow plug too high resistance, air hole next to injection point coked up, gauze around the glow plug clogged. And a few more, like a sooted up burner or heat exchanger plus some etc’s.

 

[oldbikedavey]

Throw the rotten thing away and buy a Deville 'Poele de Campagne'.......