Question about 2003 Ford Ranger Regular Cab

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2002 ford ranger contol valve on 2.3 L engine

I replaced it but it is not heating very well triing to find picture to see if i have put the hoses on wrong. Where can i find the picture our can you tell me?

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I would do this first let the vech warm up, is the vech warming up ? go to your hoses at the control valve are the hoses getting warm our is only one getting warm , if only one is getting warm go trun your heat on if both hose get warm then you have it installed correctly. if niether hose gets warm you may have a themostat problem . i hope this helps you let me know kdc744

Posted on Dec 31, 2008

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The heat system is broken


Hi,

You haven't said what is actually wrong with the heat system (there can be several different failures). For the time being I'll assume the fan blows plenty of air but the air is always cool/cold regardless of where the heat temperature selector is positioned.

The most common cause on these cars is a plugged heater core. With the engine at normal operating temperature, feel the heater core hoses (under-hood, mid/lower portion of firewall, access from passengers side). They should both be very warm. If not expect blockage in the heater core.

While a replacement heater core along with a good cooling system flush is the ultimate cure, reverse flushing the heater core will restore heat. This can be accomplished with a garden hose. Disconnect both heater core hoses (not with the engine hot as the coolant get very hot!!) and connect a garden hose. Turn on the water supply to flush the core. Flush the core in both directions (by hooking the hose to one side of the heater core and letting the water run, then disconnecting and connecting to other side of the heater core...). An old garden hose with end cut will work fine if your existing hose will not fit over the pipe (plumb it together anyway you can).

The heater core sits rather low in the cooling system. This means crud in the system will settle there eventually causing blockage. If you flush the core the crud will eventually cause blockage again. Reflushing will work over and over again if saving money is the primary goal.

If this is not the problem, the blend air door is probably not working.

Reply and we'll continue. I don't want to repeat things that have already been done, as $2000 should of covered both things I have mentioned.

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