Chevy Blazer
Heater Cores and Blower Fans
Lincoln Town Car
Car Heaters

Why your heater in 98 Lincoln town car only blow cold air?


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Wiki User
2006-04-15 07:47:20
2006-04-15 07:47:20

Could be the Climate Control Unit or Clogged heater core.

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Low coolant in the system. Defective heater control valve. Clogged heater core.

Thermostat and/or heater core may be defective

Possible causes are, low on coolant, thermostat stuck open, clogged heater core or vacuum scorce not getting to the heater control.

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Either the linkage from the temp control unit to the valve on the heater core (which is behind the radio and temp controls) or it is the heater core itself.

Your car could be low on antifreeze or your heater core could be clogged. With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!

Your thermostat is the likely culprit here it is probably stuck closed. Have it checked out.

An automobile's heater that blows only cold air could either be a faulty thermostat or, more likely, a faulty heater core. A trip to a mechanic or shop that specializes in radiator and cooling system repair should be able to diagnose and repair any problems.

You probably need to replace the heater core. Be sure to also check your coolant levels, as well as the condition of the coolant - if it's burned out, have the cooling system flushed and the coolant replaced.

The (DCCV) dual climate control valve may be damaged also called heater control valve.

If the coolant level is okay, I would suspect a restricted heater core. Try flushing the heater core.

1) low coolant? 2) bad thermostat? 3) system airbound? 4) heater core plugged? 5) heater control cable broken?

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