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Fan (interior and engine) issues - thermostat? Cooling system?
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GeordieInExile   
Thu Nov 02 2023, 10:44pm
Joined: Sep 04 2023
Member No: #5348
Location: North East England
 The interior fan is only blowing cold, originally this was on the driver's side only but it's now both sides.

The engine fan is staying on after killing the engine.

And this evening it pinged on the engine management light for the first time in ages and told me the depollution system is faulty, although it didn't cut to idle under hard acceleration.

So... am I right to guess thermostat? What else could it be?

It's the 2.7 HDi.
MGmike   
Thu Nov 02 2023, 11:07pm

Joined: May 21 2017
Member No: #3151
Location: South Queensferry
 Hmm, there could be a number of issues here.

Cold from the heater sounds like heater flaps but it's unusual to both to fail in quick succession. Combined with the fan run-on my thinking is towards the coolant (water) pump not circulating the coolant correctly. What does the temp gauge say?

Depollution error message is a catch all and only to be used as a prompt to head to the dealer to have your wallet emptied! We know better and now identify this as a need to get a code read to understand what is really going on.

Not all causes of the depollution message result in reduced performance.
MajklC5C6   
Wed Nov 12 2025, 09:06pm
Joined: Nov 02 2019
Member No: #4128
Location: Ostrava
 Hi, i have i little bot same problem. Interior not heat, only cold blow air.
Heat exchanger os hot as well. On drive side, flap servomotors turn OK. But still blow cold
And there is no blow air into back seat. Only after startup engine, whem is engie warm, fan is off. Bo air. But heat is sensing..
Can someone know what happen? Flap motor.. ?
 

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