C-max Diesel auxillary heater woes - Ford C-Max Forum
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post #1 of 1 Old 10-31-2018, 07:00 PM Thread Starter
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C-max Diesel auxillary heater woes

Hi, I posted this in another forum but perhaps it was to obscure as i haven't had any response, so i thought id try it in the main forum,

Im really hoping somebody can help me with this, about January the diesel auxiliary heater in my c-max began to get real smokey and stopped working. I recently had the car serviced and the garage says that it does work, they'd charged the battery and it came to life although it was very smokey, that i should charge the battery myself, try it out and see if it gets better. On the way home i bought a high quality charger that came with an adaptor that allows the battery to be charged in situ it required disconnecting the battery to install it. Right up to the point that i disconnected the battery the heater worked, I know this because I parked the car in the garage to be close enough to an electrical outlet, went away to get tools to do the job and came back to find the heater had started on the timer and completely filled the garage with thick dense diesel smoke.

After I'd aired the fumes out and charged the battery overnight the heater hasn't started once on timer or by "heat now" manual start. the ambient air temp is always below 5 degrees here, its got a full tank of fuel, the clock is correctly set, the fuse in the engine bay hasn't blown, I was uncertain about the battery a Bosch EFB 75Ah it was new a year ago so i took it to be tested and the shop replaced, so now it has no reason not to start that I can see.

i tested the new battery before installation and it produced 12.6V interestingly in the service menu it showed 11.8v perhaps due to power load? or perhaps this is a clue?

Have I missed anything? How would one start the engine heater other than through the dashboard menu?

Is there anything else i can try before i take it back to the workshop?

thanks in advance
Elmo is offline  
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