Question about 1998 Ford Mustang
98 Mustang v6 - top radiator hose gets very hard and engine heats to normal operating temp. Cooling fan doesn't run and AC no longer engages. Stuck thermostat? Bad temp sensor?
Make sure the radiator pressure cap is the correct one and that the hose is not soft--check the lower hose and heater hoses for softness as well. They should be firm, but not hard or cracking. The temperature sensor is reporting normal operating temperature, so it and the thermostat are working correctly (hot water would blow out of the radiator if it were stuck). Check the cooling fan for free turning and no noise. Check it's grounding connection. Check the fuse box for blown fuses to the fan and to the A/C compressor. Make sure all the relays and fuses are firmly pressed into their sockets. Check the A/C compressor clutch winding for resistance--should not read infinity. Does the blower motor for the heater/A/C run when either is turned on? The A/C switch on the dash may be defective.
Posted on Sep 08, 2009
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Posted on Jan 02, 2017
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