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2010 ,Crown Victoria air only blows cold. Thermostat and every thing else is fine

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This sounds like your temp mode actuator is stuck . if you have autotemp control your part no. is YH1766 for the actuator ! Good luck !

Posted on Nov 17, 2014


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Posted on Jan 02, 2017

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SOURCE: heater blows cold air, replaced thermostat &

either the temp control valve or blend door is faulty. are the heater hoses cold or hot. check both of them

Posted on Jul 20, 2013

  • 63 Answers

SOURCE: 2006 crown victoria - no heat

I would change the thermostat in the vehicle first and go from there. Hope this helps......Dan

Posted on Jun 21, 2008

  • 651 Answers

SOURCE: heater blowing cold air

squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.

Posted on Jan 04, 2009

  • 152 Answers

SOURCE: Blowing Cold Air

It sounds like you need to do a process of elimination, by following the travel of the hot coolant.

1. Before beginning, safety must come first, so put on a pair of safety glasses/goggles and a pair of gloves.

2.Open the hood and check the coolant level, and add if needed. If you needed to add then recheck for heat after step # 3

3. Close the hood and start and run the engine to normal operating temp.


5.Reopen the hood and lightly grasp the top radiator hose feeling for heat caused by hot coolant in the hose. Also feel the bottom radiator hose for heat, (you may have to access the bottom hose from under the car) (while down there look for coolant leak...dripping) If heat is somewhat equal between the two hoses move on. If not there are three areas to check
A) Your thermostat may not be opening
B) Your radiator might be obstructed/clogged
C) Your water pump may not be functioning

6. Locate the two smaller hoses that lead to and from your heater core (a small radiator type device located inside cab under the dash that connects through the firewall) (one is connected at the water pump to the heater core the other is connected at the engine to the heater core) one hose may have a regulator (a small mechanical device operated by either cable,electric,or vacuum that controls the flow of coolant into the heater core) attached inline

7. With the hood raised, restart the engine and adjust the heater control to max heat. Locate a safe area under the hood (free of all moving parts) to access and grasp each of the smaller heater hoses, check for heat, caused by hot coolant in the hose, also check the hose before and after the regulator described in step # 6.
If either of these locations are cold to the touch we can safely say we have narrowed the problem down to one or all of three things.

A) If all heater hoses are cold or only the inlet side of the regulator is hot and the other side is cold or warm, its possible that the regulator is faulty requiring a replacement or is not functioning due to inadequate cable,electric,and/or vacuum to operate it caused by a broken cable, electrical short or disconnected/ broken vacuum line, it also could be a defective (in dash) heater control unit or just a fuse if its electrically operated.

B) If the inlet hose to the heater core is hot and the other outlet hose is cold or warm then its possible that the heater core is obstructed/clogged, requiring a flush out or replacement.

C) If all heater hoses are hot (you may also feel a flow vibration in the hoses) then you should have heat, unless the under dash duct work is disconnected or blower fan is not operating.

I hope this helps.....

Posted on Feb 20, 2009

  • 783 Answers

SOURCE: 2006 Ford Crown Victoria HVAC only blows thru windshield defrost

You have a vacuum leak. Defrost is the default postion(no Vacuum). Start by finding the small black vacuum line near the heater hoses at the fire wall under the hood.Trace it back, it should go to a square black reservoir . Not totally sure exactly where it is located on this model,shop manual doesn't show a very good pic, but it states to remove wiper arm and pivot shaft to remove it. You will see a second line going from here to intake manifold vacuum port. Make sure you don't have a leak there somewhere.

Posted on Mar 14, 2009

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try venting the top heater hose of air,just undo the jubilee clip to expel all the trapped air.....

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Change thermostat if that doesn't solve the problem then its probaly a bad heater core

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I would change the thermostat in the vehicle first and go from there. Hope this helps......Dan

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