Question about 1992 Volvo 240

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Full-time heat in car: heater valve?

1992 Volvo 240: Heater delivers hot air even with control set to cool. I suspect it is the heater valve, not the connecting cable (as there is still tension when you slide the dash control). How much of the dash has to be taken apart to troubleshoot/repair? Where to begin? Is this a job for a semi-mechanical person? Is this an expensive repair if I take it into the shop? mark in rochester

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This problem is caused by the air temperature control blend door motor, the part is cheap, but the dash must be removed to install the new part.

Posted on May 12, 2009

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929 Mazda (1992) No Heat But A/C Works I have a 929 Mazda 1992 year. Does not blow any heat. I noted that the 30 amp fusible link for the heater was busted. Replaced it but still no heat. A busted fuse...


First check your fluid in your radiator if its low your heater will not work. Check all your heater hoses and make sure they are not kinked.
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I have a mercury mountaineer 2003 V6. It has a problem of making sound repeated when I want to have heat turned on. No sound when the dashboard A.C/Heat stays at AC level, which is the zero? level. The...


When the engine is cold,check the coolant level.

Make sure it's on max.

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A coolant system should be flush every two years.

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If you did a coolant flush recently then air pocket can be the cause of the un-even heating problem.

The DIY method is to drive you car onto a ramp or a steep hill.

Iet the engine cool off and top off the coolant tank.

Set MAX heat + MAX fan

Let the engine ran for 20 minutes wih the cap off and the trap air will escape from the coolant reserve tank,

Check coolant level and top off coolant when the engine cools down.



A shop will charge $75+ for this but using an air operated excavate tool!

========

A car with over 90K miles may experience linkage problem to the heater control valve.

The heater control valve (near the firewall) may be stick over time.

Open the hood and move the heater to max and min. Back and forth.

Clean and lube the linkage with WD-40 to free the heater control valve.

If it's a vacuum type heater control valve then cash for leaky vac. hoses.


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Move the fan switch back and forth to re-new the electrical conductors.

Pass a vacuum over the control panel to prevent dust build up behind the console.

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