Over-heating when air con on while driving

[moses.08]

- Need help... car gets hot while driving when air con is on. I have just had my air con re-gassed and have now found this problem. i have changed the thermostat, flushed radiator, put new coolant in and far as i know i have bled the system properly... any suggestions???

[vsl67]

is your thermo fan operating when the aircon is on ?

[social]

this happens in some cars in such hot weather man, i find that if u have ur aircon on for 15mins or so, once its cool turn the flow to circulate, itl put less pressure on the engine / cool it down more

[moses.08]

is your thermo fan operating when the aircon is on ?

yeah it stays on

[hako]

The car engine will run hotter with the extra load of the aircon. How high does the gauge go and does the coolant actually boil?

[v8_stato]

dont worry man i have the exact same problem with my car and i only flushed the radiator out n put coolant in it like 2 months ago so i got no idea what the prob is either.

[moses.08]

The car engine will run hotter with the extra load of the aircon. How high does the gauge go and does the coolant actually boil?

yeah keeps on get hotter as your driveing got up to 3/4 and then when pulled up and tuned off the carit dumped coolantout of the overflow but if iam park temp stays cold as

[Harvs82]

I'd suggest that your water pump is buggered, or there is a blockage in the system somewhere, if its dumping coolant from the overflow there is usually a blockage, and the overflow is the only place it can get out...

[hako]

Try bleeding the system again - once it boils it will suck air back into the radiator and you'll get airlocks and poor coolant circulation.

[bfc]

try and change the thermo fan sender unit...if its black put a white one in ( turns on at lower temp) therefore working most of the time instead of when radiator gets real hot...( bro is holden service manager so knows all the tricks)...i havent had a prob with mine since..even in 43 degree heat

[nemesis_adrasteia]

i had this problem not long ago nearly cooked my engine that real hot wek we had not long ago trned out the water pump was shagged i bought another one from repco for $120 took about 2 hours its just a matter of unbolting the old one puttung in a new gasket and the new one youll wanna bu some coolant too so mabe $20 all p it mght cost you $140-$150