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Old 12-27-2011, 07:04 PM
ram1728 ram1728 is offline
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Join Date: Dec 2011
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Default Where is Heater Control Valve on 4.0L 6cyl 1994 Ranger

Can anyone help? Can anyone tell me where the Heater Control Valve is on a 1994 4.0L 6cyl 2WD Ranger? I cannot find it.

I am having a problem with the heater not heating well. I live in southern CA where the weather is very mild but the heater would still be nice to get working again.

Here is what I have done already:
  • Last summer replaced water pump at ~150k miles
  • Have not used heater until recently and now it does not work very well, but worked great last winter
  • Checked thermostat in pot of water on stove, opened about 180F and closed (replaced 30k miles ago, no corrosion on it)
  • One hose to heater core gets hot, one gets warm
  • Flushed heater core until ran clear (didn't take much), still only one hose gets hot
  • Temperature gauge in cab of truck barely moves, but does move a little

I have not checked the heater control valve because I can't find on on this truck. Does it have one?
1994 Ford Ranger XLT 2WD 4.0L 6cyl
2009 Ford F150 XLT 2WD 5.4L 8cyl
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Old 12-27-2011, 07:09 PM
FireRanger FireRanger is offline
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Link in my signature for my heat troubleshooting guide. Yes you have a valve, but it is only for shutting the hot water off when the HVAC control is in OFF or MAX AC.

[Posted with my Android mobile device using Tapatalk Pro]
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
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How To: NO HEAT Troubleshooting Guide
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control valve, flush, heater, heater core, not working

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