What does the coolant temperature sensor switch do?
The coolant temperature sensor, also known as the coolant temperature switch, is an engine management system sensor that is used to monitor the temperature of the engine’s coolant. Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant.
Can a water temp sensor affect engine starting?
The sensor will not cause a no start. It could cause a hard start and a rich or lean condition only.
How do you know if your coolant temperature sensor is bad?
Bad coolant temp sensor symptoms are a change in the car’s mileage, an illuminating check engine, a cloud of black smoke coming from the exhaust pipe, and warnings of engine overheating. Your vehicle’s engine must stay within a specific temperature range to perform properly.
How do you test a sensor?
To test for resistance, set the DVOM to Ohms scale. Unplug the sensor and connect either leads to the DVOM probes. Read the Ohm or resistance values and compare them to those of the manufacturer. If they don’t match, the sensor is defective.
Can bad spark plug wires cause a car not to start?
Can a bad spark plug wire cause the car not to start? Absolutely yes. The spark plug wires’ primary work is to supply the necessary spark from the distributor or ignition coil to the spark plugs. If the spark plug wires fail, it can provide insufficient spark to burn air/fuel mixture in the combustion chamber.
Where is the resistor on a VW Golf heater?
The resistor is on the back of the blower connector so follow the blower wires to the heater fan housing. They should be attached to a connector on a metal plate on the front of the blower housing, so disconnect it. This plate will prise free with a screwdriver, but be careful not to snap the clips as they break very easily.
Why does the fuse blow on my Mk1 Golf?
When you’ve done that, clip it back into the blower housing. If your Mk1 Golf has been sat for a while, water may have run in from the scuttle panel, and started to rust the bearings causing the fan motor to seize; so when you switch it on, nothing will happen and the fuse will blow!
Why is my VW Golf heater not working?
Sounds like the control valve or cable that controls it isn’t working properly. There should be a way of stopping the coolant travelling into the matrix, and thus turning the heating off. Apparently my golf has everything working fine ie electrics,flaps, matrix new pump,two new thermostats,all pipes heating up as they should.
Where is the matrix on a VW Golf heater?
The matrix works like a mini radiator and the non-return valve prevents it from exploding. The valve can fail (in which case you can replace it) but if that doesn’t cure your temperature troubles, then you will need to fit a replacement matrix which is a ‘dashboard out job’ as it’s tucked up behind the middle of the facia.