Normally top of enginebeside thermostat housing ,follow top rad hose back and look in that area
SOURCE: location of engine coolant temperature sensor
Automobiles: 2000 Ford Escort ZX2 4-cylinder 2.0L MFI DOHC
NOTE
The "left" side of the engine is the driver's side.
The Engine Coolant Temperature (ECT) sensor is a thermistor (a device which changes resistance or voltage as temperature changes). The sensor detects the temperature of engine coolant and provides a corresponding signal to the PCM (Powertrain Control Module - aka "the car's computer").
The ECT sensor is mounted in the following locations (small Ford engines):
1.8L engines: in the cylinder head
1.9L engines: threaded into the heater hose inlet pipe
2.0L engines: at the left rear of the engine
2.0L Zetec Engine
(1) Partially drain the engine cooling system using a clean container. If coolant is in good condition, retain for reuse.
(2) Disconnect the battery ground cable.
(3) Disconnect the electrical wiring connector from the engine coolant temperature (ECT) sensor.
(4) Remove the retaining clip and the ECT sensor.
Fig. 1 Escort ZX2 ECT sensor - The retaining clip is removed (at the solid arrow). Withdraw ECT sensor by gently wiggling/pulling in the direction of the dashed arrow.
To install:
NOTE
Coat the ECT sensor O-ring with clean coolant prior to installation.
(1) Replace the retaining clip and the ECT sensor.
(2) Connect the electrical wiring connector from the Engine Coolant Temperature (ECT) sensor.
(3) Connect the battery ground cable.
(4) Refill the engine cooling system. An inexpensive plastic "Radiator Funnel" will help with this task.
SOURCE: how to install a coolant temp sensor in a 1995 ford escort
The coolant temperature switch and fan control switch are located sie by side, mounted in the steel portion of the heater hose that runs from the thermostat housing to the firewall, it is underneath the air intake tube and the ignition coil pack, mounted to the back of the cylinder head. Either drain out some coolant or be very quick, and you can unplug and unscrew each switch from the hose and replace it with a new one. Make sure the engine is cold. After replacing make sure to check the coolant level add as neccessary. The single wire connector switch is for the guage, and the other is for fan control. Hope this helps, let me know.
SOURCE: i have a 1cooling problem with my 1998 ford escort
I would also check the fan relay in the distribution box under the hood
SOURCE: where is the coolant temperature sensor located at
location of coolant sensor temp on 2000 expediton
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