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hi and heating issues
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Old 07 Jan 2010, 08:28 PM   #1 (permalink)
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Unhappy hi and heating issues

hi all, new to this site and look forward to speaking with you all.

I own a 1997/1998 STI, Jap import. Since owning the car it has never had heating, last week i changed the matrix and heater hoses, but still had only cold air as the heater control unit dont work. i took it to subaru who manually changed the settings to hot however only the passanger side vents were hot and the drivers side cold, not good , now the heater has decided to go completely cold again so im freezing once more

Does anyone have any ideas on what to do, as this cold is starting to get at me and it makes it hard to see thru the windscreen in these conditions.

Many thanks in advance.
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Old 08 Jan 2010, 07:45 AM   #2 (permalink)
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Re: hi and heating issues

HI,

It could be the thermostat stuck open. Have you tried replacing thermostat?
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Old 08 Jan 2010, 07:55 AM   #3 (permalink)
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Re: hi and heating issues

If it was overheating I would have said "airlock"


"airlock"

Undo the radiator type cap on the expansion tank. Then squeeze the rad top and bottom hoses aswell as smaller heater hoses etc-may see bubbles in the top as you do it thats good, once youre happy theres no more air you can get rid of try starting the car with the lid still off. (KEEP AN EYE ON IT) as it circulates. Put cap bk on after 5 or 10 mins and keep checking the coolant daily-though.



"thermostat test"

Put the thermostat in a pot of boiling water on the stove. As it heats up, its valve opens about an inch.
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Old 08 Jan 2010, 10:17 AM   #4 (permalink)
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Re: hi and heating issues

If your taking it apart to get to the stat you may as well pop a new 1 in, saves the hassle and should prove if its that.
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Old 08 Jan 2010, 07:37 PM   #5 (permalink)
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Re: hi and heating issues

For the thermostat you think the temperature gauge on the dash would be cold all the time and not reaching normal temperature as the thermostat would be stuck open overcooling the engine constantly and is the car stuck on cold all the time the temperature gauge???? might be still worth to test it to see the red arrow here is the waterpump and thermostat directly under it and as Pete said above to test it and then put cold water on it and the thermostat should seal shut check the condition of the seal on the stat the centre one if it looks anyway worn replace it might aswell
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Last edited by stiimpreza1984; 08 Jul 2010 at 11:07 PM.
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Old 09 Jan 2010, 01:32 PM   #6 (permalink)
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Re: hi and heating issues

cheers guys, not checked the thermostat yet as my engine temp goes up like normal and holds its temp ok.
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