my heater and my air condition has stopped working

160

Asked by Aug 29, 2013 at 04:48 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

no air or heat blowing at all fan does not come on changed some fuses still no change

3 Answers

40

Switch or fan motor. Check for power at the motor, if it's there it's not the switch.

2 out of 2 people think this is helpful.
45

Check the resistor block it is located in the firewall on passenger side. Also could be blower motor. Also located on passenger side

1 out of 1 people think this is helpful.
23,405

Lately, I've seen a lot of faulty fan motors working yet drawing enough amperage to fry the switch and connector. The resistor block will cause the fan to blow on High only since it bypasses the block and supplies power directly to the motor from the switch.

3 out of 3 people think this is helpful.

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