A/C accumulator - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 06-19-2014, 07:02 AM Thread Starter
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A/C accumulator

A/C accumulator-plug.jpg

A/C accumulator-cold-line-connector.jpgAs I was playing around under the hood with the batteries, I noticed this connector hanging with black tape on the end. It looks like it goes to the white piece on the accumulator and someone has put a jumper wire in it and taped it up. Anyone have any idea what its for or where to start at? Hope this all makes sense
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post #2 of 4 Old 06-19-2014, 07:08 AM
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That's the low pressure cutoff switch and connector. Either the switch or wiring went bad, or it was undercharged and someone didn't feel like paying to have the system fixed properly.
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post #3 of 4 Old 06-19-2014, 01:28 PM Thread Starter
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So how do I know if its the switch or just has a low charge. If I charge up the system how do I know if this switch is working, If it doesn't work when I change the switch I will lose my charge and have to recharge. How can I check the switch?
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post #4 of 4 Old 06-19-2014, 01:44 PM
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Assuming the A/C is at least blowing cold now, with the A/C off, check for continuity across the pins on the switch. If there's continuity, plug the connector back in to it and turn the A/C on. If the compressor cycles on and off frequently, it's time to have a set of gauges put on the system and check the pressures. If the switch turns out to be bad, then yes, the refrigerant needs to be recovered to change the switch and the system recharged.
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