k1w1t1m
Member
- Joined
- May 4, 2015
- Messages
- 42
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- Location
- Program Manager
- City, State
- Centerton AR
- Year, Model & Trim Level
- 2010 Sport Trac Ltd
This was posted in the Explorer forum this morning...
Yes there is a valve under the hood that is opened when you put the system in heat mode that allows hot coolant to circulate through the heater core. I guess that it could be sticking partially open, but goes fully open when the system flow increases. I also recall reading about some vehicles (may have only been Ford Flexes) that had issues with the motorcraft gold coolant causing heater cores to plug up with deposits.
In my experience modern cars that I have owned haven't had the water control valve. Temperature control has been performed by the blend door with hot water running through the heater box at all times. This blend door is electrically controlled so I don't see it fluctuating. I am wondering how this water controlled valve is operated if there is in fact one on the vehicle.
Yes there is a valve under the hood that is opened when you put the system in heat mode that allows hot coolant to circulate through the heater core. I guess that it could be sticking partially open, but goes fully open when the system flow increases. I also recall reading about some vehicles (may have only been Ford Flexes) that had issues with the motorcraft gold coolant causing heater cores to plug up with deposits.
In my experience modern cars that I have owned haven't had the water control valve. Temperature control has been performed by the blend door with hot water running through the heater box at all times. This blend door is electrically controlled so I don't see it fluctuating. I am wondering how this water controlled valve is operated if there is in fact one on the vehicle.