1998 Ford Ranger Constant Hot Air

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RANR1998
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  • 1 POST
I recently had my thermostat replaced in my 1998 Ford Ranger because the inside gauge on the dash was moving up to the top of the gauge into the red zone. Now I can't control the temperature, it blows hot air all the time. It didn't matter where I turned the temp dial on the dash..just hot air.. fortunately I can turn the fan completely off. I took it back in and they are telling me that it might be the heater box door at the tune of 700. to 1200. to be replaced. 7-8 hour job I'm told it will take to fix the problem. It seems strange to me because I didn't have a problem until I had the thermostat replaced. Could it be something else or is it what they are telling me.
Mar 1, 2006 at 10:01 AM
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2CARPRO BOB
  • ✓Experienced Mechanic
  • 45 POSTS
It sounds like the temperature blend door actuator has gone bad, must be a coincidence. Here is the location so you can change it out to fix the problem. Check out the images (below). Please let us know what happens.
Mar 4, 2006 at 6:01 AM

Suggested Repair

Replace the temperature blend door actuator. The expert indicated the constant hot air is likely a failed blend door actuator and not caused by the recent thermostat replacement.

Conversation Summary

A 1998 Ford Ranger began blowing only hot air after a thermostat was replaced for an overheating gauge reading. The temperature dial has no effect, though the fan can be turned off. A shop suggested a costly heater box door repair. The expert said the temperature blend door actuator has likely failed by coincidence and should be replaced.

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