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2004 f 150 A/c sometimes air is cool and sometimes

2004 F150 A/C sometimes air is cool and sometimes it is warm even at the same time out of different vents eample: drivers 2 vents cool and passanager 2 vents luke warm, other times everything seems to be ok.

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Posted on Jun 26, 2009


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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pull out the thermostat in the summer or change to a different temp control

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My 1999 E150 heat takes a very long time to warm up. sometime it takes hours and some times it takes mins but when it warms up the heat works fine

I'm no expert but I had to change my heater core once and we leaked out some of the fluid. we must have got an air pocket in the system because same thing speratic heat. change the thermosstat and make sure to bleed the system using the inline blessed valve..get rid of all the air:) hope this helps

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1999 ford f150 , after engine warms up , heater only blows warm air

Check the hoses to the heater core and make sure they aren't deteriorated. Also, it might be worthwhile to clean and flush the cooling system.

It's possible there is a problem in the controls for the air conditioning system, too. The various valves in the ducts are vacuum controlled, and if a leak develops, it's possible that cold air is being mixed with the heated air.

Nov 08, 2010 | 1999 Ford F150 Regular Cab

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The a/c started working on and off. sometimes was cooling then other times warm air only,. Had the coolant checked it was fine. I noticed the other day when you check the outside temp. the was way off...

Hi. Try to check first your refrigerant. One cause of this problem is refrigerant is running low. Did this happened from the time you turn on the AC? or at first AC is cold then after driving for a certain period of time the AC will get warm?

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My 2004 F150 supercrew 4x4 AC blowing warm air

I can give you a few tips on this but you need to check the specifics for your low and high A/C pressure switches. The 45 sounds slightly high.

What you want is to have your A/C compressor running steady for maximum cooling. This means the charge pressure is moderate and it keeps the pressure cut-off switches from deactivating the compressor clutch the longest. The pressure is high enough to keep the low pressure switch from activating and low enough to keep the high pressure switch from activating.

These switches can usually be changed without losing Freon. The spring resistance can weaken, changing when the switches work.

There is a difference in the Freon oil charge for different makers. This can affect performance and durability. The filters you mention are often contaminated when the system is open through complete Freon loss.

Another way of looking at this is a 45 psi is suppose to be Freon. All is good when it is pure, but if contaminated with ordinary atmospheric air, it can not work as good or even at all.

There are some other products you can use to clean the coils and such. A foaming product is sold at stores like Lowes or Home Depot. Theory is it works like shaving cream, expanding in the fins and pulling dirt out. You then flush with water. Check label warnings for use on different metals.

Find out when the cut-out switches are suppose to activate and what your recommended switch thresholds are. Hope this helps.

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2003 f150 5.4 A/C worked perfect fri.turned it on sat ,warm air???????? what could have happened?

did you check your coolant level ? if not that it might need to be recharged (your cooling system )

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Sounds like a compressor problem.

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F150 floods when cold, runs sluggish when warm

at that many miles its do a timing set

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Heater on ford 2003 ford pick up blows cold air

on the evap box there is a control mtr that switches the hot cold door. these mtrs are prone to failure. the other problem that i have seen is that the door breakes in side the evap box and that means removing the box to replace the door . if i remeber correctly you may have to slide the dash back to gain assces to the control mtr to test it good luck

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