I'm going to take the Triton in to get the air conditioning serviced and the filter changed. In the past Mitsu's dealers have done it at prohibitive cost, me thinks, so I have been recommended a local workshop which specialises in vehicle zircon. Any idea of how much I might expect to get charged for a routine service and filter change? Many thanks

In the past Mitsu's dealers have done it at prohibitive cost, me thinks

Can you mention the cost to remove and replace with new (or clean) the filter at the dealer ?

Mitsu is same as any other car. Buy your filter at a local shop (+- 250 baht, that's how much they are at my shop anyways) and change it yourself.

Done in 2 minutes or less.

As you could probably tell I didn't know what I was talking about! My impression was there was a problem with the filter...... duh! Anything under the boot of a car is beyond me. There was a problem according to them with the evaporator which needed replacing. Cost 6000 THB, took 2.5 hours and involved removing the dash. Big job. Anyhow, after the repair, I drove the truck down to Hua Hin , a 220 km round trip, and the aircon was perfect with the cab very comfortable and on the return I had it set at '2' on half temperature.

Of course I am left with doubts about all manner of dodgy doings on, but hey the aircon is working again!