Question about 1999 Oldsmobile Intrigue

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Had radiator flush. Even before this was done,

Had radiator flush. Even before this was done, heater does not blow very hot. Heat & fan are turned as high as they go.

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A few things to consider when diagnosing poor heater

  • Flushing the radiator doesn't do much in terms of heat. The heater core should be flushed to get rid of anything accumulated in there over the years.
  • How hot is the engine actually getting? If the thermostat is stuck open the engine may never reach proper operating temperature.
  • With the engine at operating temperature feel the hoses going into the heater core, are they hot? Some vehicles use a heater control valve that only flows coolant through the heater core when activated. They work off of vacuum and it isn't uncommon to find a broken vacuum line at the valve.
  • Are the doors in the heater box operating correctly? Can you hear the heater door inside the dash open when you select heat?
I hope this helps in getting your heat to work for the upcoming season.

Posted on Oct 06, 2009

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