Overheating issue question
#1
Overheating issue question
So I have a 98 sportsman 500 4x4 and the fan is not cycling on so I replaced the fan switch at the top of the radiator. It is pushing water as I can see it coming in thru the top of the radiator and I pulled out the thermostat ????? I can connect the two wire across the fan switch and the fan comes on???? Could the brand new switch be bad?
#2
#4
I guess you've jacked the machine up to bleed all the trapped air out of the system and the radiator is clean. Plus if both hoses are firm and hot,then possibly you may have a faulty radiator sensor or possible it's designed to kick on at a hotter than normal temperature if it's an aftermarket one and the hot light triggers first. Plus on these model you must have enough coolant to cover the sensor or you can burn one up. This was the main reason the later models had the sensor at the bottom of the radiator.
#7
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#9
Resistance check on the sensor when cold. When warm resistance should drop. When it reaches a certain temp (usually 175-180 degrees) the switch closes allowing voltage to jump to the other wire that leads to the fan. Shouldn't be a ground problem as you said you can jump the two connectors and the fan kicks on.