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Heater fan variable speed 4 speed switch onlt works on 1 speed
the car is a 1996 espace 2.1 turbo diesal
have clicked on sport wagon as your drop down doesnt list mine
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The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.
HVAC Blower Controls Circuit Description
The blower motor is a variable speed motor. The motor operates at a higher rate when voltage is increased to the maximum level.
The blower motor resistors reduce the voltage supplied from the A/C FAN fuse (LH IP Accessory Wiring Junction Block) when the blower control is set at low and medium speeds (speeds 1-4). The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.
The radiator cooling fan is a variable speed electric motor driven fan. The radiator fan assembly includes an electric motor, fan blade, and a support shroud that is attached to the radiator. The radiator fan is serviced as an assembly (fan motor/fan/shroud).
The variable speed radiator fan is controlled by the Powertrain Control Module (PCM) by way of a Pulse Width Modulated (PWM) signal. The duty cycle ranges from 30% for low speed operation then ramps-up to 100% for high-speed operation. This fan control system provides infinitely variable fan speeds, allowing for improved fan noise, A/C performance, better engine cooling, and additional vehicle power.
To control radiator fan operation, the PCM looks at inputs from:
Engine coolant temperature A/C pressure transducer Ambient temperature Vehicle speed Transmission oil temperature (automatic transmission only
It is out under the hood ,mounts in the heater case it has 4 wires going to it if your car has manual air and 4 wires coming out if is automatic control air.
its the thermal fuse on the heater risistor, if you remove the blower motor from under the bonnet and remove the heater resistor you can then buy a 79p thermal fuse from maplins and solder it on i have done it on all my espaces
It may be your blower motor RESISTOR, in gm cars it may look like a card that is connected near the blower motor,under the dash, on most cars this is what gives you variable speeds, except on the HIGH speed is usually wired directly to the battery through a relay.
This information is from my genuine service manual. I hope it is of help. Non-turbo Turbo Sedan Wagon Type 5-forward speeds with synchromesh and 1-reverse Transmission gear ratio 1st 3.454 3.454 2nd 2.062 1.947 3rd 1.448 1.366 4th 1.088 0.972 5th 0.780 0.738 Reverse 3.333 Front reduction gear Final Type of gear Hypoid Gear ratio 4.111 3.900 Rear reduction gear Transfer Type of gear Helical Gear ratio 1.000 1.100 Final Type of gear Hypoid Gear ratio 4.111 3.900 3.545 Front differential Type and number of gear Straight bevel gear (Bevel pinion: 2, Bevel gear: 2) Center differential Type and number of gear Straight bevel gear (Bevel pinion: 2, Bevel gear: 2 and viscous coupling) Transmission gear oil GL-5 Transmission gear oil capacity 3.5 2 (3.7 US qt, 3.1 Imp qt)
if the fan/motor only works on max No 4 setting ? then may i suggest you have a resistor fault or commonly known as a reostat in uk this is the component that provides the relevent reduced speeds on selection but when it fails only max speed works so you should find this unit attached on heater fan exterior if you follow wires from actual motor it will connect to the resistor unit ? then onward to switch control it is not to difficult diy and if you have access to manual/ it will give location/access for renewing? hope this helps/inspires you to diy ?
tipical espace, it wont work or only works on full speed is usually the problems. its the heater resistor, usually a thermal fuse goes on it which can be brought from maplins for 95p.
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