98 F-150 runs hot when AC is on

JAYM

MEMBER
1998 FORD F-150

It has a v-6 and 5 speed manual. Only when the ac is on does it run hot. I have replaced the waterpump, thermostat, and had the ac serviced. What could possibly cause this? Any help is appreciated.

Monday, August 20th, 2007 AT 5:37 PM

5 Replies

RASMATAZ

MECHANIC
75,992 POSTS

AC fan does it come On? When the AC is on

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Monday, August 20th, 2007 AT 8:29 PM

JAYM

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3 POSTS

Blower runs fine, only other fan is on water pump has no elec. Fan

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Monday, August 20th, 2007 AT 8:55 PM

RASMATAZ

MECHANIC
75,992 POSTS

Run the engine atleast 1 min. At 2K rpm, off it -go spin the fan on the water pump upfront does it spin easily like spinning an electric house fan when its off.

Could be a slipping belt check that too.

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Monday, August 20th, 2007 AT 9:37 PM

RASMATAZ

MECHANIC
75,992 POSTS

Can I get one free this is the 2nd time I heard about this magic tool if yes my home addy will be forwarded to your attention. Make sure its insured there's a lot funny/monkey business going on when things get shipped to the pacific side.

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Tuesday, August 21st, 2007 AT 12:06 AM

JAYM

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3 POSTS

Thanks. It seems to have worked. Now I have a brake problem. Front left caliper seems to be locking up. Rotor gets very hot. I was told that the fluid is bad. If thats the case, wouldn't everything stick?