No AC!

[Dave6170]

Today is the first day ive needed aircon and its not working! Its recently had a new belt and tensioner pulley fitted but this is the first time i ve used it. Before you could hear it click and pull on the engine when it was turned on, doesnt do that now. Fuse is fine and i can feel relay working.

Should the part with the 3 nuts spin when its running?

Im not that mechanically minded, where should i start looking? Broken wire somewhere?
Massey 6480 perkins engine

 

[Timbo]

Yes it should

 

[Still Farming]

Shocked the system???

 

[Lofty1984]

Gas has prob gone or the thermostat in the roof the part with the 3 bolts turns only when the air con compressor kicks in so it won’t be turning unless the compressor is on

 

[A1an]

If the gas has gone the clutch wont engage on the compressor. Id get it tested by someone that is certified to deal with AC.

It pays to run the AC occasionally, even when its not really needed. The gas has a lubricant in it to keep seals/valves healthy.

AC is not just for COLD air, it also conditions the air in the cab, I run mine pretty much all the time.

If Ive done a long shift in the telehandler I get really thirsty as it draws the moisture out the air.

 

[Lofty1984]

Never tried it but apparently if you have an open bottle of water in the cab it stops you getting a dry thoat and nose from the air on

 

[A1an]

Ive usually got a bottle of juice with me but if i forget it I get a sore head in the evening.

 

[Dave6170]

Thanks for the relpies. It took pretty much all winter for the mechanic to get the right belt. I never pushed him though because all the tractor does it straw bedder.

 

[Dave6170]

Got it gassed up today and its still not working!

 

[essexpete]

Either a broken wire, faulty thermostat at the cab end or a faulty LP sensor. If you can get at the thermostat switch you could try bringing it out to see if the pump kicks in.

 

[Dave6170]

I got a shot of a power probe from a friend. I put it on the plug in the line going to the compressor. It is showing 12 volts. Then i switched power probe on at the compressor and the clutch kicked in and compressor spins.

 

[Spear]

I leave my air con all year. Never turn it off and it’s never failed on any of my tractor.......yet

 

[Steevo]

Never tried it but apparently if you have an open bottle of water in the cab it stops you getting a dry thoat and nose from the air on

Yes, a drink every hour or so makes a big difference...!






Ooooh...you meant the water from the bottle evaporates up into the air and keeps it moist. I'd stick to drinking it tbh...!

 

[8100]

Are the cab filters decent .They often get over looked

 

[Dave6170]

Are the cab filters decent .They often get over looked

All new. Just had big service

 

[Flat 10]

I leave my air con all year. Never turn it off and it’s never failed on any of my tractor.......yet

Ok. I'm clearly thick but what if you have the heater on? Surely AC is working really hard to cool air that it can't and you burn lots of excess diesel?

 

[Flat 10]

@Dave6170 I feel your pain btw. Mine is U/S. They can't find the leak.

 

[Dave6170]

@Dave6170 I feel your pain btw. Mine is U/S. They can't find the leak.

I spoke to an excellent mechanic from highland tractors tonight. He s told me a few things to try and rule out

 

[puppet]

Ok. I'm clearly thick but what if you have the heater on? Surely AC is working really hard to cool air that it can't and you burn lots of excess diesel?

Can you run a heater AND aircon at the same time? I think they are mutually exclusive. Aircon heats on a cold day and cools on a hot day.
Bit like a vacuum flask. Keeps hot liquids hot and cold liquids cool. Never knew how it was programmed to tell the difference

 

[Barleymow]

always have heater and air con on on winter in car van or tractor keeps Windows clear. best to use air con regularly