C4 Pallas 2.0 coolant temperature problem

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tbyte
New User
Posts: 1
Joined: 17 Dec 2015, 21:52
Location: Sumaré (Brazil)
My Cars: C3 1.4, C4 Pallas 2.0, ex-Xsara 1.6 Hatch

C4 Pallas 2.0 coolant temperature problem

Post by tbyte »

Hi All,

I have a C4 Pallas 2.0 facing a strange temperature problem when under heavy traffic when external temperature is over 30C. In these conditions, coolant temperature can reach 110C before blower starts at full speed (half speed is on 100% of time when A/C is on).
Sometimes blower goes to full speed at 97C, but most of times it stays at half speed until 107, 110 or so.
The blower starts immediately if I disconnect the temperature sensor, so I don't think there's a problem with the sensor neither resistor/relay box. I replaced the thermostat, temperature sensor and coolant anyway.

About 10 months ago I had to replace blower brushes as it didn't start sometimes and STOP light appeared on the panel. This problem is getting me crazy, I think there should be another module/calculator that reads the sensor temperature and sends the full speed signal, but it's failing intermittently.
Any clue is welcome :)

Thanks,
TByte
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