Below are the ignition coils currently available from AA Ignition. We are constantly adding more ignition coils to our catalog so check back for new products.
HVAC Blower Motor Resistor - For Ford - Replaces# 3F2Z-18591-AA, YH-1715

- REPLACEMENT HVAC BLOWER MOTOR RESISTOR – Controls the fan speed in your AC and heating system. If you can no longer adjust the air speed with your AC controls or your air conditioner system no longer blows chances are you need a new Blower Motor Resistor.
- FITS THE FOLLOWING VEHICLES – 2008 – 2012 Ford Escape | 2007 – 2017 Ford Expedition | 2004 – 2014 Ford F-150 | 2008 – 2010 Ford F-250, 350, 450, 550 Super Duty | 2006 – 2008 Lincoln Mark LT | 2008 – 2011 Mercury Mariner | And More, SEE BELOW for all vehicles.
- REPLACES PART# – 3F2Z18591AA, YH1715, 973-444 – Easily installs into your AC blower motor. Simply remove the screws that secure the blower motor resistor into the blower, remove the resistor assembly, and install the new resistor in place.
- OEM, FIT, QUALITY, FINISH – While this is NOT a genuine Ford, Mercury or Lincoln part, it is a direct replacement. Only fits models with MANUAL AC controls. Fits various model years including 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17.
- LIFETIME WARRANTY – This HVAC Blower Fan Motor Resister comes complete with a Lifetime Warranty. If the resistor ever fails on your Ford F 150, Lincoln Mark LT, Mercury Mariner or other vehicle simply contact us for a replacement.

The AC Blower Motor Resistor controls the fan speed in your AC and heating system. If you can no longer adjust the air speed with your AC controls or your AC system no longer blows chances are you need a new Blower Motor Resistor.
The AC Blower Motor Resistor is located on lower passenger side dash and is easily accessible by removing a few screws. Installation can be completed in under 20 minutes and you can save hundreds by doing this repair yourself.
Only fits models with MANUAL AC controls. If you are unsure remove your factory blower resistor and insure it looks like the one pictured
Fits the following vehicles:
- 2008-2012 Ford Escape
- 2007-2017 Ford Expedition
- 2004-2014 Ford F-150
- 2008-2010 Ford F-250 Super Duty
- 2008-2010 Ford F-350 Super Duty
- 2008-2010 Ford F-450 Super Duty
- 2008-2010 Ford F-550 Super Duty
- 2011-2013 Ford Fiesta
- 2005-2007 Ford Five Hundred
- 2004-2007 Ford Freestar
- 2005-2007 Ford Freestyle
- 2005-2009 Ford Mustang
- 2006-2008 Lincoln Mark LT
- 2008-2011 Mercury Mariner
- 2005-2007 Mercury Montego
- 2004-2007 Mercury Monterey
Fixes common problems caused by a failing blower resistor including:
- AC not blowing air
- AC continues to blow air when turned off
- No air blowing on low AC setting
- No air blowing on high AC setting
Replaces the Following Part Numbers
- 3F2Z-18591-AA
- 3F2Z18591AA
- YH1715
- 973444
- YH-1715
- 973-444
Experience the AA Ignition Difference!
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ASE Certified TechniciansInstalling parts on you vehicle can be difficult and we understand. That’s why we have certified technicians on staff to assist you with installation or even properly diagnosing your car. Our technicians will even provide the factory repair manual to make installation easier for you. |
Strict Quality ControlAll of our blower resistors undergo strict quality control not just before shipping but throughout the production process. During each step of production multiple quality control checks are performed to insure each and every part lasts for years to come. |
An American Small BusinessAA Ignition is a division of GWA Auto Parts and we are proud to be an American Small Business. Located in sunny South Florida and founded by long time car enthusiasts, AA Ignition takes pride in providing quality products at an exceptional value. |
This is a compatible replacement part manufactured by AA Ignition. This Blower Motor Resistor is NOT a genuine Ford part. Ford, Lincoln, Mercury and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this Blower Motor Resistor fits.

HVAC Blower Motor Resistor - For Ford - Replaces# 3F2Z-18591-AA, YH-1715

- REPLACEMENT HVAC BLOWER MOTOR RESISTOR – Controls the fan speed in your AC and heating system. If you can no longer adjust the air speed with your AC controls or your air conditioner system no longer blows chances are you need a new Blower Motor Resistor.
- FITS THE FOLLOWING VEHICLES – 2008 – 2012 Ford Escape | 2007 – 2017 Ford Expedition | 2004 – 2014 Ford F-150 | 2008 – 2010 Ford F-250, 350, 450, 550 Super Duty | 2006 – 2008 Lincoln Mark LT | 2008 – 2011 Mercury Mariner | And More, SEE BELOW for all vehicles.
- REPLACES PART# – 3F2Z18591AA, YH1715, 973-444 – Easily installs into your AC blower motor. Simply remove the screws that secure the blower motor resistor into the blower, remove the resistor assembly, and install the new resistor in place.
- OEM, FIT, QUALITY, FINISH – While this is NOT a genuine Ford, Mercury or Lincoln part, it is a direct replacement. Only fits models with MANUAL AC controls. Fits various model years including 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17.
- LIFETIME WARRANTY – This HVAC Blower Fan Motor Resister comes complete with a Lifetime Warranty. If the resistor ever fails on your Ford F 150, Lincoln Mark LT, Mercury Mariner or other vehicle simply contact us for a replacement.

The AC Blower Motor Resistor controls the fan speed in your AC and heating system. If you can no longer adjust the air speed with your AC controls or your AC system no longer blows chances are you need a new Blower Motor Resistor.
The AC Blower Motor Resistor is located on lower passenger side dash and is easily accessible by removing a few screws. Installation can be completed in under 20 minutes and you can save hundreds by doing this repair yourself.
Only fits models with MANUAL AC controls. If you are unsure remove your factory blower resistor and insure it looks like the one pictured
Fits the following vehicles:
- 2008-2012 Ford Escape
- 2007-2017 Ford Expedition
- 2004-2014 Ford F-150
- 2008-2010 Ford F-250 Super Duty
- 2008-2010 Ford F-350 Super Duty
- 2008-2010 Ford F-450 Super Duty
- 2008-2010 Ford F-550 Super Duty
- 2011-2013 Ford Fiesta
- 2005-2007 Ford Five Hundred
- 2004-2007 Ford Freestar
- 2005-2007 Ford Freestyle
- 2005-2009 Ford Mustang
- 2006-2008 Lincoln Mark LT
- 2008-2011 Mercury Mariner
- 2005-2007 Mercury Montego
- 2004-2007 Mercury Monterey
Fixes common problems caused by a failing blower resistor including:
- AC not blowing air
- AC continues to blow air when turned off
- No air blowing on low AC setting
- No air blowing on high AC setting
Replaces the Following Part Numbers
- 3F2Z-18591-AA
- 3F2Z18591AA
- YH1715
- 973444
- YH-1715
- 973-444
Experience the AA Ignition Difference!
|
|
|
---|---|---|
ASE Certified TechniciansInstalling parts on you vehicle can be difficult and we understand. That’s why we have certified technicians on staff to assist you with installation or even properly diagnosing your car. Our technicians will even provide the factory repair manual to make installation easier for you. |
Strict Quality ControlAll of our blower resistors undergo strict quality control not just before shipping but throughout the production process. During each step of production multiple quality control checks are performed to insure each and every part lasts for years to come. |
An American Small BusinessAA Ignition is a division of GWA Auto Parts and we are proud to be an American Small Business. Located in sunny South Florida and founded by long time car enthusiasts, AA Ignition takes pride in providing quality products at an exceptional value. |
This is a compatible replacement part manufactured by AA Ignition. This Blower Motor Resistor is NOT a genuine Ford part. Ford, Lincoln, Mercury and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this Blower Motor Resistor fits.









