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Ask Ron Your Own Question
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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My ac cluch is not coming on : i have a few troubles my ac

Customer Question

my ac cluch is not coming on
JA: Many things can cause trouble with the A/C. Some simple, some complicated. Fortunately, the mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.
Customer: i have a few troubles my ac is not working and the compressor was short cycling and now does not come on at all
JA: Are you hoping to fix this yourself?
Customer: yes
JA: Great! What have you tried so far?
Customer: well i have hooked a guage up to low side and with truck running i have about 40 psi
JA: Is there anything else important you think the Ford Mechanic should know about your Ford?
Customer: im trying to find the relay for clutch
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Ford Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Ford
Expert:  Chad Farhat replied 1 year ago.

Hi my name is***** can will try to assist you

can you tell me year ,make & model and mileage ? thanks

Customer: replied 1 year ago.
2000 ford f150 . 5.4 v8 208345 mi
Expert:  Chad Farhat replied 1 year ago.

so low side indicating 40 psi with truck running , but a/c clutch not engaged correct other compressor is not on or is it coming on & off , is it cycling quickly ?

Expert:  Chad Farhat replied 1 year ago.

the short or quick cycling indication of low system Freon

Expert:  Chad Farhat replied 1 year ago.

but if the system is full and the compressor is cycling then we need to look at the low pressure switch mounted on the a/c drier in that model ,it will be like a screw in type ,screws on side of a/c drier with 2 wire connector on it , these are common failure on f-serie, especially at that mileage . we can test that one , with jumping the connector .if that is causing the a/c clutch from coming on off, if we jump the connector that you unplug from the low pressure switch, the ac compressor should stay on .

Expert:  Chad Farhat replied 1 year ago.

let me know what from what i described is happening and i will try to narrow it down for you.