'99 f150 with 5.4 is driving me crazy. after driving a while with ac on, come to a stop light, step on the gas and ac goes warm. turn it off, turn it back on, and it's cold again. i don't know if it's vacuum or that blend door problem i hear about ...where should i start troubleshooting? thnx
When you manualy change the temp, does it change right away? Can you hear any noises when going from warm to cold? Sounds like the blend door itself is broken.
__________________
Bottles are for Babies.
Real men get blown!
'98 supercab XLT.
2001 Lightning drivetrain conversion. 6lb lower pulley. JLP ram air intake box. Roush classic chrome wheels, FT valve body, Precision Industries 2400 stall convertor, Mark VIII electric cooling fan modified to fit in the factory shroud. Lightning front end, Harley headlights, Snug Top hard tonneau cover. Bedrug. Lighted tailgate Ford emblem, Flamed billet rear view mirror. Ported Eaton, Accufab throttle body, Ported upper and lower intake manifolds. Phenolic upper intake spacer, C&L intake tube, C&L 95mm MAF, Aux. idler for blower,etc. etc. etc..............
No, it doesn't go back to cold right away, sometimes it takes a couple of tries...and as for the noise, i can't hear anything when it goes from warm to cold, but when it goes from cold to warm, i'm starting to hear something like a little flap open or shut down there by the floorboard...blendoor? wierd...i don't know..
Well, it's the same job as replacing the heater core. The only way to get the door is to buy the whole EVAC case. It's also a good idea to replace the actuator and heater core while you are at it.
__________________
Bottles are for Babies.
Real men get blown!
'98 supercab XLT.
2001 Lightning drivetrain conversion. 6lb lower pulley. JLP ram air intake box. Roush classic chrome wheels, FT valve body, Precision Industries 2400 stall convertor, Mark VIII electric cooling fan modified to fit in the factory shroud. Lightning front end, Harley headlights, Snug Top hard tonneau cover. Bedrug. Lighted tailgate Ford emblem, Flamed billet rear view mirror. Ported Eaton, Accufab throttle body, Ported upper and lower intake manifolds. Phenolic upper intake spacer, C&L intake tube, C&L 95mm MAF, Aux. idler for blower,etc. etc. etc..............
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ac goes hot ..
Linear Mode
