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The mkiv Supra Owners Club

Temp knob light and no hot air???


Coleboy

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Guys, brought the car home tonight, my first night drive with it, i am sure my old supra,s temp knob use to have a light to show what the temp was set to, like the fan speed one! also i have found out that there is little heat coming from the heaters, are the two linked or i just unlucky????

 

Cole

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Guys, brought the car home tonight, my first night drive with it, i am sure my old supra,s temp knob use to have a light to show what the temp was set to, like the fan speed one! also i have found out that there is little heat coming from the heaters, are the two linked or i just unlucky????

 

Cole

 

There is a back light of sorts though with mine you can't actually see enough to read the temperature setting. Been that way since I purchased the car 16 years ago.

 

If you aren't getting enough heat and the engine is running at the correct temperature then it isn't a quick thermostat or radiator cap fix. You could then be looking to a restricted flow into or within the heat exchange matrix caused by an air lock or crud in the system if the flaps are operating OK. Changing out the matrix or the heater hose water valve is apparently a bit of a pain but then it is on most cars.

 

I'd suspect the water valve not opening fully - this link is useful background reading.

 

 

http://books.google.co.uk/books?id=YhLDNDp3Zl8C&pg=PA137&lpg=PA137&dq=Heater+Hose+Water+Valve&source=bl&ots=rusnUsAQtN&sig=9wWem2tRDwCyKDiNxw5Cf7YInf4&hl=en&sa=X&ei=-R3qUoruF6Wb0QWt24CYDQ&ved=0CKsBEOgBMA4#v=onepage&q=Heater%20Hose%20Water%20Valve&f=false

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I'd suspect the water valve not opening fully - this link is useful background reading.

 

 

 

Just as an add in comment, if is does turn out the be the valve then that is solenoid operated so could be as simple as a fuse fix. Its always best to check the easy fixes before doing anything major.

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