Question about 2004 Ford Ranger
The heater works but I have to constantly play with the knob to get it going.
It could either be the knob control itself, or it could be the blend door inside the box behind the passenger dashboard.
Posted on Nov 05, 2012
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Posted on Jan 02, 2017
SOURCE: the heater only blows hot air
You didn't mentioned the model year of your Ford, but you might try lubricating the heater control switch which is located in the engine compartment side against the firewall. If you have someone try to move the temp knob inside while you look in the engine compartment, you might find the control valve. Once you find it, check to see if the cable is still connected, then try lubricating it with some WD-40 at 1st to get it sliding like it should. Once the cable is opening and closing the valve like it should, you will notice the temps adjusting like they should. Good luck!
Posted on May 08, 2009
is the coolant flowing thru the radiator check bottom hose should be same temp as top hose if not could be clouged radiator or week water pump
Posted on Jul 27, 2008
Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.
Posted on Jan 26, 2009
There is small cable that runs from the back of the temp control switch on the console that goes through the firewall and loops around a valve on the heater hose that is used to control the amount of hot coolant that goes into your heater coil. This cable hooks on the back of the temp control switch also. Bad news, that's probably where it came off and you'll have to pull the control unit out of the dash to get to it.
Posted on Aug 11, 2009
The valve (called the heater tap) which controls the hot water flow works from engine vacuum. The climate control unit turns vacuum on to close the valve and turns vacuum off to open it, if the vacuum tubing or vacuum service valve has failed, the tap will be open allowing hot water to flow. The same result applies if the heater valve itself has failed (which they do --regularly) Trace the water hoses from the enginebay firewall under the hood and you should find the valve. Check for cavuum at the valve with the climate control set to its coldest setting. If you have vacuum at the valve, replace the valve. No vacuum points to the loss of vacuum source or a faulty vacuum service valve with will be electrically operated from the climate control. Trace the vacuum hose from the heater valve back to the vacuum service valve and check if the valve has vacuum supplied to it. No vacuum means a vacuum hose has blocked, has a hole in it or has been removed from the manifold. If the electrical valve has vacuum, check for power. If power is present but still no vacuum at the heater tap, replace the service valve. If power missing, check fuses. If both wires to the valve show power present, have the climate controll unit checked by a professional..
Posted on Oct 31, 2009
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