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Model specific boards => Golf mk3 => Topic started by: 1 gti on 28 June 2012, 23:49
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My temperature control is stuck on hot!! Not good when it's 20c, lol. Fan speed and direction still works normal. Taken the unit out and the temperature wheel just turns but cables don't move. What's the possible causes? Cable come off on the flap end? Any help would be appreciated. Cheers
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I guess the cable has come off, cannot see it being much else.
Is the engine temp all ok.
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Engine temp doesn't go past 70. Doesn't over heat or anything though. That's most prob temperature sensor
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Sounds like you need a thermostat for starters as the temp gauge should sit at 90 once the engine is warmed up.
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Thermostat? That's the temperature sensor right?
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No, its a temperature sensitive valve that sits beneath a plastic housing on the side of the water pump.
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No seperate bits, temp sensor does what it says, and thermostat regulates the engine water temp to 90c by directing coolant out to the radiator as needed.
If it comes up to 90c when standing, then thermostat needed.
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Doesn't over heat. When driving and ticking over it stays at 70 and no higher. Going to change thermostat and see what happens. I think it's heavy on diesel too
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Engines generally overfuel when they don't reach optimum running temperatures as they over compensate with open chokes, cold start valves etc.
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Hope the thermostat is at fault then :smiley:
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NEWS!!! New thermostat fitted and went for a spin to test and all was well until the needle reached 100c!! No fan coming on, no over heating and Water in the expansion tank weren't bubbling and the engine feels the normal temperature. Dodgy needle in the dash? any help would be appreciated before I decide to torch it!! Lol. Must remind you it's a diesel if it makes a difference. Cheers
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Temp sender ??
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As Deano said, replace the temp sender.
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Air lock maybe?
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Went out this morning and the needle was on 70 and overheated on me, flashing light on dash. Free car anybody? Where's the temp sender located? Cheers
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Located at the top right hand corner of the front of the block. The top hose goes to it and it will be a coloured part. Let the car cool down beforw changing and its a two minute job to change.
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Went out this morning and the needle was on 70 and overheated on me, flashing light on dash. Free car anybody? Where's the temp sender located? Cheers
Sounds like to me that it has an air lock.
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That's what i reckon as well.
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Try running it from cold with the heater on full and the cap off the expansion tank, keep squeezing all the hoses to get the air out until the engine starts to warm up then put the expansion cap back on but keep the heater on full and keep your fingers away from the cooling fan in case it comes on suddenly.
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Overheated on Saturday and the radiator was stone cold, just bought new waterpump. Hope this works, nothing but bad luck last week. Keep you posted :smiley:
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Still sounds like an airlock or dodgy thermostat.