Jaguar s-type 2000. is the heater core and the A/C in same airbox
Jaguar s-type 2000. is the heater core and the A/C core in the same airbox? Heat comes from vents, but no A/C. a/c reads as charged. when a/c turned on, a faint hissing sound (like a vacuum leak) can be heard coming from inside the dash. how do i get to this equipment to check it out?
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Probably air locked. check to see if one of the hoses leading into heater is hot. Other cause could be heater solenoid control valve faulty.
Very unlikely that the heater matrix is blocked.
Easiest way to bleed heater is to remove hose's when car is cold and GENTLY flush through with garden hose and push hoses back on when full of water, so you know you have a heater full of fluid.
Hope this helps
Sounds like your heater core could be blocked up or a blockage in the pipes. Most car heaters run off a heater core that cycles hot water from the engine's water jacket, or a heat exchanger around the exhaust manifold, through the core, with a fan then blowing this hot air through the vents to you. If the pipes from the water jacket to the heater core are blocked then no hot water will get through. Alternatively, the heater core or pipes may be damaged and leaking. Check to ensure you're not losing any coolant. If it's the heater core, there's really nothing for it but to replace it. I'm not 100% sure where it would be on your car, on my old car it was up behind the centre console, under the dash.
Hope that helps.
you either have a restriction in the cooling system like maybe a restricted heater core or the water pump impellers are corroded and no blades are left. Only way to tell is to remove the water pump and inspect then replace it since its off.
Or remove the heater core hoses and blow thru.
If anyone ever put a stop leak in the radiator this can cause blocked lines.
Without additional information, it sounds like the new heater valve is not connected electronically. Without voltage the valve will default into an open position, causing the heat to stay on. check electrical connection to valve, simply press on top of connector to ensure tight fit. if ok, check fuse.
Once its connected properly the valves will close automatically and will only allow hot water to flow to heater core when driver turns it on from climate control switch.