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Old 02-20-2011, 11:17 AM
TruckGal00 TruckGal00 is offline
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Join Date: Feb 2011
Posts: 1
Default Running Cold

I have a 2000 Ford Ranger with a new t-stat and recently new coolant. I was having overheating problems hence the new t-stat. Now my truck runs in the normal on the surface streets but runs cool on the freeway. The heater blows warm air on the freeway but it is not the warmest of air. There shouldn't be any air in the system. Any suggestions before ripping into the truck to replace the heater core?
2000 Ford Ranger XLT V-6 3.0L
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Old 02-20-2011, 12:14 PM
Twisty Twisty is offline
Ford Tough
Join Date: Jun 2009
Posts: 422
Default Re: Running Cold

Wrong temp on the thermostat or defective.
2006 4.0 5 spd auto 4x4 Super Cab
BF Goodrich Commercial Traction T/A's
Royal Purple Throughout
Alpine Head Unit with some Infinity Noisy Stuff
NW Oregon
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Old 02-20-2011, 09:11 PM
sgtsandman sgtsandman is offline
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Join Date: Mar 2010
Posts: 3,078
Default Re: Running Cold

Agreed with above, it should be cooking you out at the max setting.
Sgtsandman's Work in Progress
2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
1999 Honda CR-V EX, RT4WD, 2.0L, 5 Speed MT, 4.56:1, open differential
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Old 02-20-2011, 09:13 PM
terryduanemiller terryduanemiller is offline
Join Date: Oct 2010
Posts: 1,896
Default Re: Running Cold

flush the heater core in both directions... very common problem..
1999 MAZDA 2500SE, 2.5L 4-clanger, 5 speed, Green n slow. Rangers as daily drivers since 1988.
ASE Certified Mechanic, Builder of Show Destroying Protouring and Classic cars..
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