What happens if the expansion valve is stuck open?
If the expansion valve is stuck open or clogged, the A/C system will not cool properly. A clogged valve will increase the pressure in the system and cause the A/C compressor to overheat. If the valve is stuck open, too much refrigerant is allowed to pass through the system and into the compressor.
Where is the a / C pressure sensor on a Jaguar?
A/C pressure sensor/switch: 2. Check the fuse for the Heater Valve. It is Fuse 32 (10 amps) in the Front Power Distribution Fuse Box, located in the engine compartment. This fuse is hot +12 volts at all times, and also feeds the Auxiliary Coolant Pump Relay (4.0L models) and A/C Clutch Relay.
Where is the climate control module in a Jaguar?
For 2003-2008 models, there are three (3) versions of the module. In cars without navigation, the CCM is part of the Climate Control Assembly. Cars equipped with navigation use a Remote Climate Control Module (RCCM). The RCCM is hidden behind the glovebox.
How to diagnose a heater leak in a Jaguar?
1. Unbolt the Coolant/Water Expansion Tank, set it aside so it doesn’t block access to the Heater Valve. 2. Loosen the bolt that secures the Heater Valve to the car. 3. Rotate the Heater Valve to get access to its connector. Procedure A (This one is messy. We recommend that you do Procedure B instead.):
Is there over current fault protection on Jaguar S-types?
There is no over-current fault-protection circuitry that protects it against damage due to faulty Heater Valve. This applies to S-Types from (late 2002) through 2008. The 1999 – (early 2002) modules, though still susceptible to damage, have a more robust design that reduces the chance of said damage.
How does an air conditioner compressor work in a Jaguar?
COMPRESSOR – The A/C compressor pumps the refrigerant through the system. It’s operated by an engine belt, just like the alternator and power steering pump. The only difference is that the A/C compressor has a clutch that engages and disengages the compressor as needed.
Why does my Jaguar air conditioner need to be removed?
Any moisture in the system will freeze up at the expansion valve and will clog the system, so it has to be removed. Then, it’s back to the compressor, and the cycle starts over. Remember, anyone can perform mechanical work on an A/C system without a license, but no one is allowed to vent any refrigerant into the atmosphere.
Where is the air con located in a Jaguar?
There are two fan assemblies located very low down under the dash, just above the driver’s and passenger’s ankles. They have two linked flap valves, one on top, one beneath, operated by a vacuum ‘motor’. In their ‘relaxed’ state the top valve is open which directs fresh air into the airblend box.
A/C pressure sensor/switch: 2. Check the fuse for the Heater Valve. It is Fuse 32 (10 amps) in the Front Power Distribution Fuse Box, located in the engine compartment. This fuse is hot +12 volts at all times, and also feeds the Auxiliary Coolant Pump Relay (4.0L models) and A/C Clutch Relay.