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jettadan1, Technician
Category: Mazda
Satisfied Customers: 5064
Experience:  Mazda Technician
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Mazda 3: ac..he indicator light goes off when it quits cooling..relay

Customer Question

mazda 3 ac goes on and off, he indicator light goes off when it quits cooling. how do i diagnose a bad ac relay?
Submitted: 6 years ago.
Category: Mazda
Expert:  jettadan1 replied 6 years ago.

this is a great relay info site on testing.

Customer: replied 6 years ago.
i know how to read out a relay, i have purchased a mitchell mazda 3 subscription so i will read things out.

i was just asking the best way to diagnose the relay when there is an intermittant on off problem sorry i wasn't that clear.
Expert:  jettadan1 replied 6 years ago.

you could have a low freon issue where the sensor is shutting it down. This could also be a short in the wiring problem. you can do wiggle tests with ac on to check connections. to trouble shoot this condition you have to act like it never works.graphic


I am pretty sure its the high pressure switch or connection.