Yes. Do not engage Defroster, Heat or AC switch. Most vehicles have a pressure switch but it is better safe than sorry.
http://autotechac.com/ac-facts-and-myths
do i need to flush the lines out?
If you can flush the lines. Flush them. It cant hurt and you really don't want fine metal shavings in your new A/C Compressor.
the reason i am replaceing the compressor the clutch seized up and broke the belt what do i use to flush the lines out with?
I would use a vacuum to power flush your system. Remember to add Ester oil to your system after flushing.https://www.youtube.com/watch?v=m1QpGb1f...
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SOURCE: 2000 lincoln Navigator air suspension
There are level control sensors they look like little arms (with joints like your elbows) mountesd on lower control arms. They may be at fault they control the height and turn the pump off when the height is reached. try adjust height first before you replace, they can be adjusted. Good Luck
SOURCE: 1999 Lincoln Navigator Heating Problem
if the heater core is getting hot then the problem is the air temp control blend door actuator, a common problem.
SOURCE: 1999 Lincoln Navigator ABS warning light turns on?
One of the ABS sensor's is bad or a hub bearing is bad.Could be front or rear.
SOURCE: my 1998 navigator 4 wheel drive got stuck& now ac wont work
2 different electrical circut's that are unrelated. Ac on a 12 year old truck is bound to need some service. Take it to a trusted shop that is not hurting for work & ask them if anything is disconnected, ie: compressor power wire, high pressure switch...ect. Tell tale sign system is low on freon is the compressor keeps cycling on & off with a clicking sound or compressor does not come on at all.
Testimonial: "Thanks that relieves my mind that they might have disconnected something accidently. "
SOURCE: where are cylinder 4 and 8 on my 1999 Lincoln
4 8
3 7 this is how the firing order is for future reference
2 6 1-3-7-2-6-5-4-8 and looking to the left are the
1 5 cylinders as if you're looking at the engine.
Testimonial: "was very helpful answered my question with no BS"
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