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Re: Thermostat Problem
Posted by Ro in Woodbridge [Email] (more from Ro in Woodbridge) on Thu, 16 Nov 2023 12:59:48
In Reply to: Re: Thermostat Problem, fdw201
[Profile/Gallery]
, Thu, 16 Nov 2023 10:27:46
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fdw201,
Reading from WIS, low speed cooling fans will operate if A/C Pressure Sensor (620) provides pressure 9 - 18 bar and also dependent on vehicle speed and ambient temperature just as you say.
Before spending on a new A/C pressure sensor, I would try the following troubleshooting...
Vehicle with coolant temperature of 98 deg C or bellow, A/C engaged, try disconnecting a connector at A/C pressure sensor. DICE (628) unit will stop receiving A/C pressure data, A/C clutch should disengage and radiator low speed cooling should stop. While there, I would also do a wiring check of three conductors running from A/C Pressure Sensor (620) to DICE (628).
Cheers,
posted by 135.23....
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