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Heat & AC Parts

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • FREE SHIPPING OVER $249
    Peterbilt AC High Pressure Switch Replaces 18-03835 By BESTfit

    Peterbilt AC High Pressure Switch Replaces 18-03835 By BESTfit

    BESTFIT TRUCK PARTS

    $28.56
    Replacement HVAC High Pressure Switch By BESTfitThe BESTfit AC High Pressure Switch is a reliable replacement designed for Peterbilt trucks, engineered to maintain optimal HVAC system performance...
    01-070022
    SKU:
    01-070022
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $28.56
    Qty in Cart: 0
    Price:
    $28.56
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit AC Condenser 31.25 X 15 Inch For Peterbilt 330 & 335 1995-2004

    BESTfit AC Condenser 31.25 X 15 Inch For Peterbilt 330 & 335 1995-2004

    BESTFIT TRUCK PARTS

    $114.99
    BESTfit AC Condenser For Peterbilt 18-03722The BESTfit AC Condenser 31.25 x 15 inch is a high-quality replacement designed for Peterbilt 330 and 335 models from 1995 to 2004. Featuring a durable core...
    01-070016
    SKU:
    01-070016
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $114.99
    Qty in Cart: 0
    Price:
    $114.99
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD 10.95 X 8.82 X 2.875 Inch AC Evaporator For Peterbilt

    TPHD 10.95 X 8.82 X 2.875 Inch AC Evaporator For Peterbilt

    TPHD

    $77.99
    AC Evaporator Fits PeterbiltThe TPHD 10.95 x 8.82 x 2.875 inch AC Evaporator is a premium replacement part engineered for Peterbilt trucks, designed to deliver efficient cooling and maintain a...
    01-070014
    SKU:
    01-070014
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $77.99
    Qty in Cart: 0
    Price:
    $77.99
    Subtotal:
  • TPHD 11.875 X 8.75 X 1.5 Inch AC Evaporator For Peterbilt

    TPHD 11.875 X 8.75 X 1.5 Inch AC Evaporator For Peterbilt

    TPHD

    $121.99
    AC Evaporator Fits PeterbiltThe TPHD 11.875 x 8.75 x 1.5 inch AC Evaporator is a high-quality replacement part designed specifically for Peterbilt trucks. With precise dimensions of 11.875 inches by...
    01-070011
    SKU:
    01-070011
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $121.99
    Qty in Cart: 0
    Price:
    $121.99
    Subtotal:
  • FREE SHIPPING OVER $249
    HVAC Blower Motor Replaces HA11550 By BESTfit For Peterbilt 359 Cab & Sleeper

    HVAC Blower Motor Replaces HA11550 By BESTfit For Peterbilt 359 Cab & Sleeper

    BESTFIT TRUCK PARTS

    $119.99
    BESTfit Blower Motor With OE Style Plug Fits Peterbilt 359Ensure consistent airflow and reliable climate control in your truck's cab with the BESTfit HVAC Blower Motor, designed to replace part...
    01-0700010
    SKU:
    01-0700010
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $119.99
    Qty in Cart: 0
    Price:
    $119.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 Plastic AC Drain Pan 4.25 X 10.5 Inch By BESTfit

    Peterbilt 359 Plastic AC Drain Pan 4.25 X 10.5 Inch By BESTfit

    BESTFIT TRUCK PARTS

    $117.99
    BESTfit 4.25 X 10.5 Inch Plastic AC Drain Pan Fits Peterbilt 359Keep your truck's air conditioning system dry and functioning properly with the BESTfit 4.25 x 10.5 inch Plastic AC Drain Pan. Designed...
    01-0700009
    SKU:
    01-0700009
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $117.99
    Qty in Cart: 0
    Price:
    $117.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 HVAC Moisture Indicator Replaces 70R3530 By BESTfit

    Peterbilt 359 HVAC Moisture Indicator Replaces 70R3530 By BESTfit

    BESTFIT TRUCK PARTS

    $65.99
    BESTfit HVAC Moisture IndicatorThe BESTfit HVAC Moisture Indicator for Peterbilt 359 is a high-quality replacement for part number 70R3530, designed to protect your truck's air conditioning system...
    01-0700008
    SKU:
    01-0700008
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $65.99
    Qty in Cart: 0
    Price:
    $65.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 28 Inch Fresh Air Cable With Looped Ends Replaces FA10750 By BESTfit

    Peterbilt 359 28 Inch Fresh Air Cable With Looped Ends Replaces FA10750 By BESTfit

    BESTFIT TRUCK PARTS

    $30.16
    BESTfit Fresh Air Cable With Looped Ends Fits Peterbilt 359This 28 Inch Fresh Air Cable with Looped Ends fits Peterbilt 359 is designed to replace your OE FA10200 factory style defroster cable. This...
    01-0700007
    SKU:
    01-0700007
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $30.16
    Qty in Cart: 0
    Price:
    $30.16
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 Heater Control Valve By BESTfit

    Peterbilt 359 Heater Control Valve By BESTfit

    BESTFIT TRUCK PARTS

    $69.99
    BESTfit Heater Control Valve Fits Peterbilt 359This aftermarket Peterbilt 359 Heater Control Valve Cab is designed to replace your factory style heater control valve. This heavy duty steel...
    01-0700006
    SKU:
    01-0700006
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 With Red Dot AC Cab & Bunk Blower Resistor Replaces RF369B220165 By BESTfit

    Peterbilt 359 With Red Dot AC Cab & Bunk Blower Resistor Replaces RF369B220165 By BESTfit

    BESTFIT TRUCK PARTS

    $14.56
    BESTfit Cab & Bunk Blower Resistor Fits Peterbilt 359 With Red Dot ACThis aftermarket Cab and Bunk Blower Resistor with Red Dot AC for a Peterbilt 359 is designed to replace your OE CA09900,...
    01-0700005
    SKU:
    01-0700005
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $14.56
    Qty in Cart: 0
    Price:
    $14.56
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 Heater Core For Cab Replaces 280244 & MC1020 By BESTfit

    Peterbilt 359 Heater Core For Cab Replaces 280244 & MC1020 By BESTfit

    BESTFIT TRUCK PARTS

    $220.99
    BESTfit Peterbilt 359 Heater Core For Cab OnlyAre you getting little to no air flow when you turn the heat on in your truck? 4 State Trucks carries this replacement heater core for a 1977 - 1987...
    01-0700004
    SKU:
    01-0700004
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $220.99
    Qty in Cart: 0
    Price:
    $220.99
    Subtotal:
  • 5.125 Inch Diameter Aluminum Blower Motor Wheel Replaces HC10100 By BESTfit For Peterbilt 359

    5.125 Inch Diameter Aluminum Blower Motor Wheel Replaces HC10100 By BESTfit For Peterbilt 359

    BESTFIT TRUCK PARTS

    $37.03
    BESTfit 5.125 Inch Diameter Blower Motor Wheel Fits Peterbilt 359This 5.125 Inch Diameter Aluminum Blower Motor Wheel for a Peterbilt 359 is designed to replace your OE HC10100 factory style blower...
    01-0700003
    SKU:
    01-0700003
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $37.03
    Qty in Cart: 0
    Price:
    $37.03
    Subtotal:
  • Peterbilt 359 18.75 Inch Water Valve Cable With Looped Ends Replaces FA10200 By BESTfit

    Peterbilt 359 18.75 Inch Water Valve Cable With Looped Ends Replaces FA10200 By BESTfit

    BESTFIT TRUCK PARTS

    $34.32
    BESTfit 18.75 Inch Water Valve Cable With Looped Ends Fits Peterbilt 359This 18.75 Inch Water Valve Cable with Looped Ends for a Peterbilt 359 is designed to replace your OE FA10200 factory style...
    01-0700002
    SKU:
    01-0700002
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $34.32
    Qty in Cart: 0
    Price:
    $34.32
    Subtotal:
  • FREE SHIPPING OVER $249
    Peterbilt 359 10.5 Inch Defroster Cable With Looped Ends Replaces FA10900 By BESTfit

    Peterbilt 359 10.5 Inch Defroster Cable With Looped Ends Replaces FA10900 By BESTfit

    BESTFIT TRUCK PARTS

    $24.96
    BESTfit 10.5 Inch Defroster Cable With Looped Ends Fits Peterbilt 359This 10.5 Inch Defroster Cable with Looped Ends for a Peterbilt 359 is designed to replace your OE FA10200 factory style defroster...
    01-0700001
    SKU:
    01-0700001
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $24.96
    Qty in Cart: 0
    Price:
    $24.96
    Subtotal:
  • BESTfit AC Evaporator 11.875 X 7.875 X 3.125 Inch Replaces NC10000, RD214850, ABPN83307255 For Peterbilt 359, 378, 379

    BESTfit AC Evaporator 11.875 X 7.875 X 3.125 Inch Replaces NC10000, RD214850, ABPN83307255 For Peterbilt 359, 378, 379

    BESTFIT TRUCK PARTS

    $322.99
    BESTfit 11.875 X 7.875 X 3.125 Inch AC Evaporator Fits Peterbilt 349, 357, 359, 372, 378 & 379Ensure efficient cooling and comfort in your truck's cab with the BESTfit AC Evaporator measuring 11.875...
    01-070000027
    SKU:
    01-070000027
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $322.99
    Qty in Cart: 0
    Price:
    $322.99
    Subtotal:
  • Peterbilt Pressure Switch Pigtail Wire Harness W/ 2 Wire Weatherpak Connector By BESTfit

    Peterbilt Pressure Switch Pigtail Wire Harness W/ 2 Wire Weatherpak Connector By BESTfit

    BESTFIT TRUCK PARTS

    $34.99
    Wire Harness Assembly for Pressure SwitchThis pressure switch pigtail is designed specifically for use in Peterbilt trucks. It features a two-wire WeatherPack connector, making it reliable and easy...
    01-070000025
    SKU:
    01-070000025
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $34.99
    Qty in Cart: 0
    Price:
    $34.99
    Subtotal:
  • Peterbilt 330, 357, 379, 385 2 Pin Low Pressure Switch Normally Open Replaces 18-03834, P93CAA3604-1, 18-04331 By BESTfit

    Peterbilt 330, 357, 379, 385 2 Pin Low Pressure Switch Normally Open Replaces 18-03834, P93CAA3604-1, 18-04331 By BESTfit

    BESTFIT TRUCK PARTS

    $29.99
    BESTfit Low Pressure Switch With Metric Fitting Style, Close 47 PSI & Open 23 PSIMaintain optimal performance and safety in your truck's air conditioning system with the BESTfit 2 Pin Low Pressure...
    01-070000024
    SKU:
    01-070000024
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $29.99
    Qty in Cart: 0
    Price:
    $29.99
    Subtotal:
  • Peterbilt 2 Pin AC High Pressure Switch Normally Closed Replaces 18-03835, P93CAA3605-1 By BESTfit

    Peterbilt 2 Pin AC High Pressure Switch Normally Closed Replaces 18-03835, P93CAA3605-1 By BESTfit

    BESTFIT TRUCK PARTS

    $30.16
    BESTfit Open 330/370 Close 180/240 PSI High Pressure Switch Fits PeterbiltEnsure reliable performance and safety in your truck's air conditioning system with the BESTfit 2 Pin High Pressure Switch...
    01-070000023
    SKU:
    01-070000023
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $30.16
    Qty in Cart: 0
    Price:
    $30.16
    Subtotal:
  • BESTfit AC Expansion Valve, Block Style For Peterbilt 387, 587

    BESTfit AC Expansion Valve, Block Style For Peterbilt 387, 587

    BESTFIT TRUCK PARTS

    $56.99
    BESTfit Flange Mount Block Style Expansion Valve With 1.5 Ton RatingThe BESTfit Block Style AC Expansion Valve is a premium replacement designed for Peterbilt 387 and 587 models, delivering reliable...
    01-070000017
    SKU:
    01-070000017
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $56.99
    Qty in Cart: 0
    Price:
    $56.99
    Subtotal:
  • BESTfit AC Expansion Valve, Block Style Replaces 540057BSM For Peterbilt 387 1999-2001

    BESTfit AC Expansion Valve, Block Style Replaces 540057BSM For Peterbilt 387 1999-2001

    BESTFIT TRUCK PARTS

    $60.99
    BESTfit Expansion Valve With 2 Ton Rating Fits Peterbilt 387Replace your Peterbilt 387's AC expansion valve with the BESTfit Block Style Expansion Valve, built to exact OEM specifications for...
    01-070000016
    SKU:
    01-070000016
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • Total: items /

Adding your products to cart

Frequently Asked Questions About Heat & AC Parts

How do I know if a heater or AC component will fit my truck?

Heat and AC parts are often specific to the make, model, and year of your truck, as well as the cab configuration. Check the product listing for compatible makes and models before purchasing, and compare part numbers with your existing component whenever possible. If you are unsure, our customer service team can help confirm fitment before you order.

Can I install a heater core, blower motor, or AC component myself, or do I need a professional?

Many components, such as blower motors, resistors, and control switches, can be replaced by drivers or shop technicians comfortable with basic electrical and mechanical work. However, jobs involving the AC refrigerant system, such as compressors, condensers, or evaporators, require certified equipment to safely recover and recharge refrigerant, so these are typically best left to a qualified technician.

What is the difference between OEM and aftermarket heat and AC parts?

OEM parts are made to match the original specifications of your truck and are often priced higher, while aftermarket parts are manufactured by third parties to fit and function similarly, usually at a lower cost. Both can be reliable options, so it often comes down to your budget, the specific part you need, and any preference for original manufacturer branding.

Why is my truck's AC or heater not working as well as it used to?

Reduced heating or cooling performance is commonly caused by issues like a failing blower motor, a clogged heater core, low refrigerant, a worn compressor, or electrical problems with switches and resistors. Diagnosing the exact cause usually requires checking airflow, listening for unusual noises, and inspecting for leaks or worn components before selecting a replacement part.

Do heat and AC parts come with a warranty?

Warranty coverage varies by manufacturer and specific part, so we recommend checking the warranty information listed on each product page before purchasing. If you have questions about a warranty on a specific item, our customer service team is available to help clarify coverage and terms.


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