Question about 1987 Volvo 240

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Heat When Heater Isn't On

When driving heat comes through the vents although the heater is not on.

Also, how do I repair the odometer?

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  • LateForWork Nov 19, 2008

    Same problem...It's impossible to turn the air vents off. If it's turned to heat then it blows heat, if it's turned to cool then it blows cools air. Turning the fan off doesn't help...

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  • 21 Answers

Hi. . . . . well maybe your aircons just screwed up. . . cuz that would make the air hot. . . another would be your evaporator fan is wrecked ( this is true if your aircon is cold when you start up but after a while jsut gets hot)

about the odometer. . . first chec if your speedometer is working , , cuz if it ist then the odometer isnt the problem . its your speed sensor thats wacked. . . . 8) if the odometer is broken you gota take it out and check for breaks in the circuits or wiring ,,, or just go to a junk shop and change it , , , , bet you can get a cheap 1 . . . . .

Posted on Oct 22, 2008

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Posted on Jan 02, 2017

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If u have issues with heatting may be this will help.

1- If the carpet under the heater core is damp, or if antifreeze vapor or steam is coming through the vents, the heater core is leaking.Remove it and install a new unit (most radiator shops will not repair a leaking heater core.

1 - If the air coming out of the heater vents isn't hot, the problem could stem from any of the following causes:
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  • If flushing fails to remove the blockage from the heater core, the coremust replaced.

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