heater blowing cold
05 December 2013, 06:29 PM
#31
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Is this Scooby specific then as this isn't the case with every other sealed system I've used. The heater matrix is an integral part of the coolant system and in most cases it is sat on top of by a sealed air box the keeps the heat out dependant of a mechanical flap. I used to run an Astra MK2 track car and foolishly left the heater matrix uncovered in the cabi . Toasty warm!!!!
05 December 2013, 06:30 PM
#32
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Water pump does pump water around you're right but if your talking about changing/refilling coolant system then you have to turn heaters to fully on and this gets the water around the heater matrix, which is closed untill you turn on heaters,as its the heated water that allows heaters to come out warm (engine & heaters use same water)
The whole point is that, the heater matrix on a Subaru (and many other cars now) is a full flow matrix and does not have any valves that close it off from the rest of the system.
All the heater switches do are to operate flaps that mix cold and hot air to the required temp.
As previously said the necessity to put the heater switch to hot is a total misconception on modern cars.
NO VALVES
Last edited by Don Clark; 05 December 2013 at 06:34 PM.
05 December 2013, 06:38 PM
#33
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Jim, did you read the rest of this thread before posting??
The whole point is that, the heater matrix on a Subaru (and many other cars now) is a full flow matrix and does not have any valves that close it off from the rest of the system.
All the heater switches do are to operate flaps that mix cold and hot air to the required temp.
As previously said the necessity to put the heater switch to hot is a total misconception on modern cars.
05 December 2013, 06:53 PM
#34
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changed coolant and my heaters blows warmish air, got no leaks,have i got a air lock? how do i get rid? pump bottom hose when idling with header cap off with heating on full blast and full speed ? temp fine and no hg failure tested all that, and i back fed via tub hose!and checked thermostat. anyone?
06 December 2013, 09:48 AM
#36
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