Question about 1989 Mazda 323
I am not sure how mechanically inclined you are, but the first test would be the motor of the fan itself. Try wiring that up straight to the battery. You can try this with starter cables if you don't have anything else. If the fan motor turns, then you know it's the temperature switch either located on the radiator, or somewhere by your engine where the coolant hose goes (thermostat housing). If you have a multimeter, you can measure the resistance of that switch, if the car is hot (hot coolant) then you should have an infinite reading, if not, replace that switch.
Posted on Aug 21, 2010
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Posted on Jan 02, 2017
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Hello and welcome to FixYa!
If you have overheating problem, it can lead to multiple
issues. You may be running on low coolant that's why the vehicle overheats. If
that's the case, please add coolant and make sure that it sits on the right
level, too much coolant can cause overheating too for coolant will overflow.
The vehicle may have a faulty or worn out radiator blower
motor that's why it overheats. If that's the case then you will need a blower
motor replacement to resolve the issue.
If the radiator is clogged with dirt and rusts this issue
occurs too. The coolant doesn't flow normally on the cooling system if it's
clogged. If that's the case, I strongly suggest that you have the radiator
flushed to drain out dirt and rusts. If you think that the radiator served you
enough then it's better to have it replaced.
Please do check the radiator hoses, If you have worn out
hoses it can cause coolant leakage which can result to overheating. A tiny hole
is good enough for the vehicle to overheat.
A faulty thermostat sensor can cause the issue too. If you
have worn out thermostat, the fan may not trigger that's why the fan won't work
when under stressed conditions. A blown radiator blower fuse can cause this
issue too so I suggest that you check the radiator blower fuse and replace it
when necessary. What causes the radiator blower fan fuse to blow? It's because
of a failing radiator blower motor, If that's the case have the radiator blower
fan motor replaced.
Hope you find this information helpful enough and thank you for using FixYa! Have a good one!
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