Hi everyone , l have a scenic mk3 1.5dci and the climate control isnt working. The fans blow okay but no warm.air. The expansion tank keeps overflowing water when the engine gets hot. I am wondering if it could be the thermostat that is faulty?
Any ideas?
Scenic mk3 heater not working
Moderator: RichardW
Scenic mk3 heater not working
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Re: Scenic mk3 heater not working
Your suspicions sound correct - does the top hose get hot or stay cold?
On second thoughts, the heater supply bypasses the thermostat so there may well be another problem - a failed water pump perhaps.
On second thoughts, the heater supply bypasses the thermostat so there may well be another problem - a failed water pump perhaps.
Re: Scenic mk3 heater not working
Recently had a water pump and timing belt replacement
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Re: Scenic mk3 heater not working
Perhaps the system was not bled correctly and there is an airlock preventing circulation?
Re: Scenic mk3 heater not working
I have opened the heater matrix and the thermostat vent plugs......
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Re: Scenic mk3 heater not working
Worst case scenario would be a failed head gasket causing the system to be pressurised, the combustion gas escaping can fill the heater matrix and stop the water from circulating.
Peter
Peter
Re: Scenic mk3 heater not working
No bubbles in the expansion tank though which l would have expected if it was the head gasket
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Re: Scenic mk3 heater not working
Well, it seems like the head gasket has failed, so you right Peter N.
£500+ of a job. I may as well have the glow plugs changed too.
£500+ of a job. I may as well have the glow plugs changed too.
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