I have a 1999 F150, the heater works as far as all the knobs functing, the fan selections are all ok, the thermostate rotates and seems to functioning properly. I only get warm air, and can go from floor to defrost correctly. I have tried putting in a tee and flushing the system with prestone cleaner and flushed. Still just luke warm air. Any help will be great. Its cold in Mo.
2006-11-30 23:53:03 · 9 answers · asked by kathyannage 2 in Cars & Transportation ➔ Maintenance & Repairs
Three things:
Make sure the radiator is full. (Not just the resrvoir). This will cause that.
Is the engine thermostat functioning? After driving the radiator hoses should be too hot to touch.
If both above are OK then the core is clogged and needs replaced.
2006-11-30 23:56:38 · answer #1 · answered by tumbleweed1954 6 · 1⤊ 0⤋
Your heater core may need cleaning or to be replaced, as far as buying a new one and replacing it, I just replaced my heater core on my 1998 F-150, and it took 12 hours to do the job. You have to remove the entire dash and about 100-200 screws, not fun! I would recomend getting the manual for the truck as well. As for the thermostat, if its stuck in the open position and coolant is flushing through the system constantly your engine will not heat up fully, this is not good for the motor aswell, definately change the thermostat if you have not, they are not expensive for your truck it would cost around $12.99 and if I am correct should be a 195 degree version.
2006-11-30 23:58:09 · answer #2 · answered by badk0re 2 · 0⤊ 0⤋
You might have a heater valve on the inlet hose under the hood. If it is not fulling opening it will restrict the hot water flowing thru the heater core. That will give you the luke warm air.
2006-12-01 00:04:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
On one of the heater hoses up toward the firewall on the right side you will See a valve that is hooked into the heater hose. This valve has a wire hooked to it that moves a lever back and forth on the valve. It probably has come off. Simply put it back on. You may have to make a minor adjustment on clamp that holds the wire. The wire only sits on the valve lever. Check it out--it's an easy fix
2016-05-23 07:24:39 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Your heater core may need cleaning or to be replaced, as far as buying a new one and replacing it, I just replaced my heater core on my 1998 F-150, and it took 12 hours to do the job. You have to remove the entire dash and about 100-200 screws, not fun! I would recomend getting the manual for the truck as well.
2006-11-30 23:59:38 · answer #5 · answered by imran_raphiphop 2 · 0⤊ 2⤋
The thermostat is stuck open. This allows coolant to circulate continuously through the radiator. It is a cheap, easy fix.
2006-11-30 23:57:30 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Try a new thermostat and bleeding the air out of the cooling system.
2006-11-30 23:57:30 · answer #7 · answered by R W 6 · 0⤊ 0⤋
there are a number of reasons for this issue....you have covered some .....the mixture of antifreeze and water is off.....the thermostat in the engine block is not opening at the right time (it may be opening to soon or is staying open).....or your heater coil is in need of replacement
2006-12-01 00:18:01 · answer #8 · answered by waynecomcast 1 · 0⤊ 0⤋
You need a new thermastat.
2006-11-30 23:55:13 · answer #9 · answered by Anonymous · 0⤊ 0⤋