Mazda 626 Radiator Fan
Culprits behind Mazda 626 Radiator Fan Problems
A faulty radiator fan could mean big trouble. Without any air flow to take the heat away from the radiator, overheating is a definite possibility. Once you notice that your temperature gauge is giving high readings, be sure to inspect your radiator fan immediately for any problem. Read on to learn how to troubleshoot issues with the Mazda 626 radiator fan.
Radiator fan does not turn on
If the radiator fan does not move even after switching the engine on, this is probably because no electricity is getting to the fan. To see if the fuse had burned out open up the fuse box of the Mazda 626; you can consult a manual if you're having trouble finding the fuse. Next, inspect the radiator fan relay to see if it is still working. If the problem lies with either the fuse or the relay, have this replaced immediately to solve the problem.
Broken or damaged wires are another reason why electricity is unable to get to the fan. You can test out the wires with a voltmeter; if there's no reading given off by the meter, then the wires are indeed problematic. Inspect the wires that connect the radiator fan to the engine harness and check if any wire is damaged. Replace the damaged wire/s to fix the problem.
The problem may also lie with the fan switch. The fan switch activates the radiator fan when the engine reaches the appropriate temperature. To determine whether or not the switch works, remove the switch from the harness and connect the two harness contact points with a wire. If the fan turns on, then the fan switch is indeed faulty. Replace it in this case.
High temperature readings despite a running fan
Though it may not be evident at times, malfunctioning radiator fans will occasionally run a little slower. This makes them unable to circulate enough air through the radiator to cool down the engine compartment. Listen for any noise in the fan; a grinding noise could mean that the bearings are shot. The fan motor could be faulty as well, so test it out using a voltmeter. You should get a reading of 12 volts across the motor-any less means that the current flow is no longer efficient.