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Old 03-22-2016, 05:01 PM   #1
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AC problems

cannot get ac clutch to come on freightliner m2 2006
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Old 03-22-2016, 06:38 PM   #2
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May be low on the refrigerant. Same thing happen to me, I added 1 can and it's been good for 6 years.
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Old 03-22-2016, 09:51 PM   #3
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X2 on the refrigerant.
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Old 03-23-2016, 08:50 AM   #4
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Since you are asking it seems yiu may not be in a position for DIY.

Either your problem is electrical meaning bad wire, fuse or switch or is low presure.

Locate all ac related fuses and check both fuses and voltsge.

Next check for voltage on the compressor clutch.

These new key switched on but engine may not need to be running but some may need to be depending on control systems so follow up there may be needed.

Locate the pressure switch and check it.

Do this be either locating manual or following wires from compressor.

Confirm switch is good and if showing open unplug wires and with a tiny wire short the two and listen for clutch to click.

This could indicate low gas so check that next.

NEVER operate the ac with that switch bypassed as it can ruin the system and be a very bad day...

They do sell multiple options for self repair so one could try.

However a bit of advice is to proceed with caution.

Visit a well stocked automotive supply with the hope of good counter support.

Ask and look for a recharge kit that includes a Guage that shows pressure.

Many have a single can of gas with a reusable hose and others have single use hose with lousy meter.

The one with the reusable hose and better meter ate the preferred with a full manifold being best.

By simply attaching the hose with the meter to the port you can observe the system pressure to note if enough there.
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Old 03-23-2016, 10:27 AM   #5
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Quote:
Originally Posted by TQ60 View Post
Since you are asking it seems yiu may not be in a position for DIY.

Either your problem is electrical meaning bad wire, fuse or switch or is low presure.

Locate all ac related fuses and check both fuses and voltsge.

Next check for voltage on the compressor clutch.

These new key switched on but engine may not need to be running but some may need to be depending on control systems so follow up there may be needed.

Locate the pressure switch and check it.

Do this be either locating manual or following wires from compressor.

Confirm switch is good and if showing open unplug wires and with a tiny wire short the two and listen for clutch to click.

This could indicate low gas so check that next.

NEVER operate the ac with that switch bypassed as it can ruin the system and be a very bad day...

They do sell multiple options for self repair so one could try.

However a bit of advice is to proceed with caution.

Visit a well stocked automotive supply with the hope of good counter support.

Ask and look for a recharge kit that includes a Guage that shows pressure.

Many have a single can of gas with a reusable hose and others have single use hose with lousy meter.

The one with the reusable hose and better meter ate the preferred with a full manifold being best.

By simply attaching the hose with the meter to the port you can observe the system pressure to note if enough there.
replaced drier binary switch and high pressure switch had system charged and if I jump a wire to clutch kicks in takes temp at vent to 47 degress I have traced all wires checked and cleaned fuse box this unit only has a few fuse but no breakers only moduel's that run all aspects of the truck when it is jumped pressures are spot on cant find out why there is no power to wires to the binary or high press. switch im jus shy of putting a match to it or gun to my head either of those might work thanks for the info I guess ill be checking every thing one more time,dammit my lighter is out of fluid lol
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Old 03-23-2016, 10:38 AM   #6
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I had a similar problem. Jumper wire would activate the compressor clutch.

But the voltage read was too low at the clutch per some AC test source I found.

So the conclusion was that the clutch was failing.

This is the same sort of reference:

AC compressor won't run - Ricks Free Auto Repair Advice Ricks Free Auto Repair Advice | Automotive Repair Tips and How-To
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Old 03-23-2016, 10:48 AM   #7
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Have you bypassed the high and low switch them selfs. Take the switch out of the system for the test. And don't forget some has a freeze switch.
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Old 03-23-2016, 10:49 PM   #8
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Jump switch or jump to switch?

Sounds like power source issue.

Get a voltmeter and start at the switch and work towards the battery.

If yiu have a body control module it can be toast.

Can you contact coach builder and get a wiring diagram or seek one from other users?
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