Question about 2004 Ford Explorer
Number 12 is heater control valve. Number 11 is vacuum line, full vacuum and the valve will shut off coolant flow. I can't say the valve is the problem? Maybe the heater core needs to be flushed? When you say coolant doesn't flow, you mean through heater core?
Posted on Dec 05, 2016
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Posted on Jan 02, 2017
The heater only blows HOT air when set on defrost or floor settings. If you have the lever set for vent, only cold air will come out. Check to make sure you set the controls to floor or defrost. This is standard for all Festiva's.
Posted on Nov 16, 2008
impeller is made of plastic on teh water pump and its slipping and spinning on the shaft renew before weather warms up as engine will overheat
Posted on Jan 01, 2009
SOURCE: 04' Passat Overheating
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
If persistent boil ups/over attention must made in the cylinder head
or gasket area, or possibly water pump?
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Posted on Mar 02, 2009
That is usually the first symptom of low coolant. Not enough water in the system to circulate through the heater core. Has it been running hot?
Check the coolant level in the radiator
Posted on Sep 23, 2009
this problem is caused by a part called the "temperature control blend door actuater motor" this litttle motor drive moves the door that diverts air over the heater core or AC evaporator core, when it fails it almost alwys fails in the AC only position, u will need to have the motor drive replaced
Posted on Oct 16, 2009
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