Edmunds Answers

Voted Best Answer

  • avatar obyone 11/30/08 4:18 am PST

    After running the truck to operating temperature shut it off and check the coolant level in the radiator. Usually needs to be topped off after replacing coolant. Low coolant level is the primary reason for the heater not working.


    If there was no circulation, you car would overheat no ifs ands or buts so you are getting coolant movement. The fact that the temp gauge not rising above the half way point is an indication the your cooling system is operating in the correct temperature. If your thermostat was stuck in the open position, the coolant will take longer to heat up, but it will heat up enough so that the heater would eventually work.

Answers

  • tony78 11/28/08 11:30 pm PST

    If your temp guage does not have numbers on it to indicate what the engine temperature is, then you can bet your bottom dollar that just about halfway on the guage is your engines normal operating temperature,,or about 200 hundred degrees.

    Flushing the system at home means that you drained all of the old coolant out,filled the system with water and operated the engine,,you repeated this process until finally clear water drained from the system.

    Then you refiiled the system with water and added some powder or liquid flush agent,ran the engine about a 1/2 hour to give the insides a good scrubbing, drained and refilled etc, etc. until clear water draind out,,,yada yada,,,does that about sum it up ?

    Now you probally are aware that you should only put distilled water in to an automotive cooling system and only in an emergency should you ever add tap water. That is because tap water has minerals in it and those minerals will percolate out of the water and clog up the radiator and the heater core and sometimes no matter how good of a flush job you do the heater core will still be clogged up and the car will never get warm on a cold winter morning, right ?

    Usually you can tell if one heater hose is warmer than the other if the heater core is clogged, although they usually start to go bad after 8-10 years or so,some will make it 15 years but that is very rare.

  • tjkachel 11/28/08 11:51 pm PST

    I am not familiar with the Taurus engine, but I had the same problem with my Ford Tempo during very cold weather. The thermostat valve was stuck open which allowed the antifreeze to flow through the whole system (therefore the car never overheated). The problem with a stuck valve is that it doesn't partially close to allow the coolant to heat up sufficiently to warm up the heater core. Hope this helps.

  • obyone 11/30/08 4:18 am PST

    After running the truck to operating temperature shut it off and check the coolant level in the radiator. Usually needs to be topped off after replacing coolant. Low coolant level is the primary reason for the heater not working.


    If there was no circulation, you car would overheat no ifs ands or buts so you are getting coolant movement. The fact that the temp gauge not rising above the half way point is an indication the your cooling system is operating in the correct temperature. If your thermostat was stuck in the open position, the coolant will take longer to heat up, but it will heat up enough so that the heater would eventually work.

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