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Make sure the sensor is pushed right into the coil and not sitting on the face, so it can get a decent coil temp reading, If there is a restriction on air flow, that will cause a coil to ice up and so will the unit being short of gas and a restriction in the TX Valve will cause the same problem. bGet some coil air on and air off temps and post them, it will tell me roughly what is going on, but it's a bit hard without knowing gas pressures.
Cheers Ian
I hope this will round out this post.
I have attached some pics of this mornings' work.
I put it down to a dodgy thermistor, but I couldn't confirm it, not without resistivity figures for the thermistor. The local guys didn't have any, and I later found out that one I likely needed had been discontinued.
I put the ohm-meter across the wires and got 1.1kOhm resistance in ambient conditions. In a bath of ice water I read 2.8kOhms.
I rang the local electrician and asked if they had any thermistors. They suggested I go to the dump and see if I can get some from some of the old split-system house aircons, which I did. It would have been hit-and-miss buying without knowledge of their resistance curves/tables.
Anyyywayyy... I salvaged 6 of them, tested them all in ambient air and ice water and from there selected the one with the lowest electrical resistance as a test (with the aim of working up until one, if any, sufficed). I hit the jackpot on the first one!! It was reading 3.5kOhm at ambient (32 deg or so) and 9.5kOhm in ice water. Once installed it was cutting the AC on and off at acceptable levels. I have managed, after about 30 minutes of driving, to find that setting the temp dial about half way around works great, though the kids in the back were still complaining they were hot. I think this more a 300tdi issue...
The photos are of the actual new thermistor, just fitted. The one I removed was jammed in the hole visible in the photo. The mechanic advised that it should be mounted on the fascia of the outflow, just as it is now.
The bonus was that the next thermistor to test was very similar to the 1st in resistance, so I'll keep it as a spare.
In the end, I have solved and fixed it with great input from fellow LR enthusiast. Thanks. Cost me $2 in fuel to get to the dump and a bit of time. I hope this helps someone else.
Next task is to improve A/C efficiency in the Landy - Ideas? I'm thinking window tinting and clear blind to cover the cargo barrier?
Catchas,
Joshua.
I found this post while doing a search for more information.....
I am having the same symptoms as Joshua mentioned; icing up, etc.... I know there could be a number of causes, but to start crossing them off could anyone walk me through accessing the evaporator on my 110 (2005/ TD5)? It has never been removed and cleaned before, so would be confident that it would benefit from a good cleaning.
Thank you in advance