Question about 1999 Ford F150 Regular Cab

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No heat for a 1999 f150 p/u - 1999 Ford F150 Regular Cab

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Stuck open thermostat is the usual problem,,not usually hard to change out.

Posted on Sep 29, 2009


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Heater runs all the time, even when heat turned to off, no ac either anymore. this is on a 1999 ford f150

sounds like an issue with your diverter door under your dash is stuck in heat mode. When you turn on a/c, the door should close off the heater core section and open up and let your evaporator (a/c) open . You will have to figure out if its your controller or the door. Older units used cables and had no issues. Yours probably has electronic control /motors, etc.

Mar 30, 2014 | 1999 Ford F150 Regular Cab

1 Answer

1999ford-f150-thermostat heater won't give heat

check coolant level,also you mayneed a thermostat
dose it have a heat control valve

Oct 03, 2011 | 1999 Ford F150 Regular Cab

1 Answer

1999 ford f150 only blows cold air, blend door works fine and the heat core is getting hot. I moved the temperature dial towards cold the other day and the heat hasn't worked since. Please help. Thanks

the flapper door is not closing and opening is located in the duct work....remove heater control panel and follow the cable to the flapper door

Jan 26, 2011 | 2001 Ford F150 Styleside SuperCrew

1 Answer

No heat 1999 ford f150 5.4 liter

Mice Getting into my heater blower cage Do you know where the cold air intake is located

Dec 03, 2010 | 1999 Ford F150 Regular Cab

1 Answer

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

Nov 30, 2010 | 1999 Ford F150 Regular Cab

1 Answer

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

1 Answer

1999 ford f150 heater no blowing any heat

Sounds like the thermostat is stuck open and needs to be replaced. That would be the first place to look. If all teh hoses are not hot, that would be a good indicator.

Dec 28, 2009 | 1991 Ford F150

1 Answer

No heat

This problem is due to a failed temperature control blend door actuator motor, go to the link below it shows u how to replace it, u must remove the dash assmebly.

Oct 21, 2009 | 1999 Ford F150 Regular Cab

1 Answer

1999 ford f150 heating ac system can not get heat


Oct 13, 2009 | 1999 Ford F150 Regular Cab

1 Answer

I cannot switch from A/C to Heat on my 1999 F150

Check the blend door actuator. The door that the actuator hooks in to tends to break. Visit for more info.

Mar 15, 2009 | 1999 Ford F150 Regular Cab

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