I have a peugoet 308 57 plate The problem is I am getting Luke warm Air into the car but it does not seem to get hot I have had the pipes checked from the engine which are all fine and what they should be also I have all the air locks done but still Luke warm in the car Anybody as any idea's which could help Thanks wayne

PAUL MC G

• 1280 Answers
• Posted on Sep 12, 2009

SOURCE: fluctuating engine temp a/c sends out cold air intermittently

Here's the thing. The ECU will shut down AC if the engine temperature is too hot. If the coolant temperature sensor is malfunctioning (lying to the ECU) telling it that the temperature is hotter than it actually is, the computer will turn the AC OFF.

SOURCE: hi,iv got 2002 jaguar s type r last week it

yes you got it in one,, its an air lock stoping the water going round the heater, you need to blead the air out rad seal wont block up the heater,,,,iv used it many times,,,my old truck ran with it in for years!
look for a bleed scew on a water pipe and open it with the motor running let water ran out till no air is in it, top up header tank as well

SOURCE: Mercedes 190E heater blowing just luke warm air

there should be an electric water pump exclusively for the heater. on these 201 body cars it should be under the hood, on the passenger side,near the fender well. when the heater is engadged, this pymp should turn on pushing the hot water into the heater core. if these are not working, it will obstruct the water flow.

SOURCE: Air, no heat '98 Astro. No leaks, engine

It sounds to me that you may have 2 problems. 1). Air Lock in the Heater Core. 2). Inactive Heat Damper in the Plenum.

But since you state that the Heater Hoses do not get warm that is indicative of an Air Lock in the Heater Core. This is a relatively simple fix. It is best performed COLD but requires a method of pressurizing the Cooling System. All reputable Auto Parts stores Sell and/or Rent Pumps that temporarily replace the Radiator Pressure Cap for Leak tests and curing Air Lock. The Collant Level must be filled FULL then pressurized and then loosening the Highest Heater Hose at the Firewall so that Air and a Small Amount of Coolant escapes. Once all the Air has escaped tighten the Heater Hose Clamp, remove the Pressure Pump, Restore the Collant Level to FULL, re-install the Pressure Cap and Start the Engine. As it Warms up you should be able to feel coolant running through the Heater Hoses and they should become warm.

SOURCE: 1999 Honda Accord heater not blowing hot air

Sounds like a thermostat or cooling system issue. Change the fluid and the thermostat. It will do your engine good so it's money well spent.