Question about 2001 Mercury Grand Marquis

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My cabin fan will only operate on high speed. This is a 2006 with only 11K on it. Any ideas for a fix?

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  • Mercury Master
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Resistor pack has failed. Pack is usually accessible from the engine compartment along the firewall to the upper left as you look in. Cannot find exact location for your car--sorry

Posted on Sep 04, 2010

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Posted on Jan 02, 2017

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My car 2008 Chevy Uplander warning light came on stating A/C shut off for engine protection. My question exactly as 1posted 2011. Gauge not Reading. Fan running continuously. Doesn't seem hot.


What gauge not reading , Temperature ? you posted back in 2011 ? You did feel you should take it to the repair shop ? You need to take this to a ASE certified repair facility ! This is a complex electronically controlled cooling system , Three relay's controlled by the ECM -engine control module turn the fans on in two different speeds ! There could be DTC'S diagnostic trouble codes stored in the ECM, HVAC module , BCM !
Circuit/System Description
The engine control module (ECM) commands the fans ON in high speed or low speed. In low speed, the fans are configured in series. In high speed, the fans are configured in parallel.
In low speed operation, the ECM applies ground to the coil side of the low speed fan relay, which is the Fan 1 Relay. Voltage is applied directly to the left cooling fan through the switch side of the low speed fan relay. The right fan is connected in series to the left fan through the de-energized Series/Parallel relay, which is Fan 2 Relay, so that both fans operate at low speed.
In high speed operation, the ECM applies a ground to the coil side of the low speed fan relay, the Series/Parallel relay, and the high speed fan relay, which is the Fan 3 Relay. Voltage is applied directly to the right cooling fan through the switch side of the high speed fan relay. The left cooling fan obtains voltage through the low speed fan relay and ground through the Series/Parallel relay.
When the ECM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. When the ECM is commanding a fan relay OFF, the voltage of the control circuit should be high, near battery voltage.
One of the relays could be stuck on ! An for the gauge you have to have it removed an fixed , there is a stepper motor behind the gauge needle an they go bad ! Or replace the instrument cluster !

May 14, 2015 | Cars & Trucks

1 Answer

Why does cabin fan stop


The vehicle is equipped with Automatic Temperature Control, which automatically controls fan speed based upon cabin temperature. Check your user manual for proper operation of the system before proceeding further.
If your fan is stopping before achieving the temperature you set, suspect overheating of the fan relay, a defective fan resistor, or a bad ATC.

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1 Answer

Car fan speed


fa speed control module located i think in the air intake duct under the dash after the cabin filter

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2004 chyrsler pacifica front fan stops on high


Replace the resistor in the front fan system.

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2001 Town and Country has only high speed fan both front and back fans. Connector to fan has 12v only on one of the 6 leads. Grounding the lead with the 12v on it turns fan on high speed. Where is...


if the blower only blows on high then it is you blower motor resistor that is located behind the glove box it has two screws that hold it in place

Jun 19, 2009 | 2001 Chrysler Town & Country

2 Answers

2002 Ford Taurus blower fan only works on high


fords are notorius for faulty fan switches, you will need to get a new one, but it will probably fail in a year or two.

Nov 10, 2008 | 2002 Ford Taurus

1 Answer

A/C Fan No-Go - Clarify solution posted by by Jason Wagner


Hi Marc,
I'm not too clear as to which of the two AC fans is not working.....Is it the condenser fan (the one out front of the radiator, mounted at the front of the engine compartment) or the cabin fan?.....either one will stop working in the event of low gas pressure in the AC system.

Is the AC working at all?

The removal of the center consul is not a small job....and to get to the resistor, is also, not very easy....I'm sure that if it is the resistor that has become defective, you'll be able to get one from a breakers yard....They don't usually give problems on the BMW....Incidentally they control the lower speeds of the interior fan operation, but not the high speed, so if the fan works when full and not any other speed, the resistor is the problem.

The fan operation is also fused....A good idea is to check the fuses....

Does the climate control work?

I think I need more clarification and then hopefully I can help a little more....

Best regards Johngee10






Aug 22, 2008 | 1999 BMW 328 Series

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