antonneumann10
CMAX Poor Engine Running Cold Start
Summary of the thread
The conversation revolves around a 2008 Ford CMAX diesel experiencing poor engine performance during cold starts, suspected to be caused by a faulty PTC heater. The issue included higher fuel consumption and less effective heating. A similar experience was shared, suggesting the electric auxiliary heater might be defective. The problem was confirmed and resolved by replacing the auxiliary heater at a workshop.
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4 comment(s)
antonneumann10 (community.author)
Heating seems less effective than before, especially during shorter trips. Could you elaborate on how you resolved your issue? I am particularly curious if it also involved the PTC heater.
reinhard_feuer7
If your heating is less effective and your engine's grumbling more than usual on cold mornings like a grumpy bear, I'd say there's a strong chance it's the PTC heater. In my case, the electric auxiliary heater was, in fact, defective. To be on the safe side, I would suggest you take your car to the workshop!
antonneumann10 (community.author)
Based on your feedback, I inspected the heating element, and I agree: it is the likely cause. I took the car to a local workshop, and indeed the auxiliary heater was defective. The repair cost me approximately 350€. The problem is solved now. Thank you again for your advice!
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FORD
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CMAX
reinhard_feuer7
I think I might have had a similar experience with my CMAX (though not the same build year). I had cold start issues, like the engine was struggling like an old steam engine warming up on a winter's morn! Did you notice any issues with your temperature control in general, like the heat not working as efficiently as it used to?