Hi Guys,
I wonder if anyone can shed any light on the above.
The car has Air Con but it doesn’t work. We had our dog in the car yesterday and I turned it on to cool him down but all it did was pump out hot air.
I’ll be driving to Germany next week and I’d like it sorted before then.
The light on the switch comes on but I can’t hear the pump kick in or the revs drop.
It possibly needs a Re-gas but is there anything I can check in advance of going to a dealer?
TIA
Not really, the procedure for the self diagnosis is listed in another post that I replied to recently but the most likely problem is low gas as you suspect.
Thanks Robbie, but would low gas stop the pump from running?
My concern is I take it to a dealer to re-gas and they then say it still doesn’t work
I did do a search but could find anything other than a chap who didn’t actually have Air Con fitted.
Yes, the self diagnosis procedure is in that topic isn’t it?
The dealer should check the system pressure before re-gassing it to confirm that it’s low. There is a pressure switch the stops the pump running and the fan cutting in if the pressure is low.
Hi Robbie,
I’ve just another look at the previous topic (for the benefit of others http://www.mx5oc.co.uk/forum/yaf_postst72136_Climate-control---car-hot-but-still-blowing-full-heat-after-20-miles.aspx ) and yes you’re right it does contain self diagnosis procedure.
All the lights lit doing the first test, I could check the Solar Radiation Sensor as we only have the stupid eco friendly bulbs, I then tried the final test the A/C button lit up on all occasions except Auto, Feet only and feet and screen on the mode dial.
I can also confirm my car does have the tube attached the the rear of the grated panel below the DSC button.
Thanks for your assistance with this.
Heres a picture of under the bonnet where you can see the recharge valve.
There are 2 charge ports, the other is at the rear of the engine bay on the passenger side from memory.
These two points here?
Is there anything else I can check before I go to my local A/C charging dealer (not a Mazda Dealer)?
Yes, they are the charge ports (high pressure and low pressure when the system is running). You could bridge the pressure switch terminals and check that the pump and fan cut in but I can’t advise which wire colours to bridge without a wiring diagram. If there are only 2 on the pressure switch (near the high pressure charge port) then you could disconnect the connector and bridge the wires In the harness with the engine running and the AC on. Do it at your own risk though without checking a wiring diagram.
Thanks Robbie,
I can confirm the solenoid clicked and the fan cut in.
Therefore I think it is likely it just needs re-gassing or possibly a new high pressure switch.
£10 says the switch is fine and it’s just a re-gas that it needs…
The AC guy should check for any leaks too. It may have a leak or the gas may have just leaked out over time. There is a pipe on the left hand side of the condenser that you can see by looking through the lower air intake in the bumper, check for dampness round that, I’ve known them to leak.
Thanks for all your help, it greatly appreciated.
I’ll report back once I’ve had it re-gassed.
Thanks again
Just been out to have a look at the pipes an they look dry, but then it could have leaked away a month or more ago.
It usually leaves an oily patch.
Fingers crossed the pipes are ok then so hopefully only a re-gas.
It’s this technical feedback that makes me pay my annual membership.
What a nice positive attitude, thank you.
We had ours re gassed but have found out since it’s leaking so it’s not going to last long. Have been quoted if it’s the condenser then nearly £300 fingers crossed for you
Didn’t they check your system for leaks before filling it with gas?
I have insisted that mine is checked beforehand, I’ll know tomorrow afternoon (fingers crossed)