I got a 2007 crown vic - 4.6L, At idle the a/c blows hot & the compressor cycles frequently. Once you get moving like around 15 mph or more its ice cold. Anybody have any ideas whats wrong??
The cycling is like it's low on freon, but they don't get ice cold driving. See what the pressure readings are.
If the radiator cooling fan will not turn on with the A/C on then you will get frequent cycling sitting still and poor A/C. When you start moving, andf get airflow through the condensor, A/C starts working again. See it all the time on PT Cruisers all the time. The low speed fan doesn't come on, the high side pressure skyrockets, and the compressor is shut off. When the high side pressure is so high, you'll notice the engine bog before the compressor is shut off.
Anywho, there is a TSB for the fan motor on the Crown Vic.
ENGINE OVERHEATING - POOR A/C PERFORMANCE
2006-2007 Crown Victoria
2006-2007 Town Car
2006-2007 Grand Marquis
This article supersedes TSB 06-20-3 to update the Service Procedure.
Some 2006-2007 Crown Victoria, Grand Marquis and Lincoln Town Car vehicles built before 8/31/2006 may experience intermittent engine overheating and/or poor A/C performance due to an inoperative engine cooling fan motor.
Follow the Service Procedure steps to correct the condition.
WARNING IF EQUIPPED WITH A FIRE SUPPRESSION SYSTEM, THE BACKUP POWER SUPPLY MUST BE DEPLETED BEFORE LIFTING THE VEHICLE.
SEE WORKSHOP MANUAL (WSM), SECTION 419-03 FOR DETAILS.
Verify proper cooling fan operation, and if required, replace the cooling fan with a revised motor and fan assembly. Refer to the appropriate WSM, Section 303-03 for Cooling Fan Motor and Shroud Replacement. If the fan is inoperative, replacing the thermostat will not resolve this issue.
Part # 7W1Z-8C607-B
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT : Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
Labor Operation 070905A 2006-2007 Crown Victoria, Grand Marquis, Town Car: 0.9 Hr.
Replace The Engine Cooling Fan, Includes Time To Diagnose Fan (Do Not Use With 8621A, 8621B)
BASIC PART NO. CODE