20% OFF $150+ orders using code: SUNNY20 Online, Ship to Home orders only. Max discount of $50. Valid 5/29 – 6/2/2025. Shop Now | Get Details
How Automotive A/C Systems Work
Automotive A/C systems rely on a precise process of refrigerant flow, pressure changes, and heat transfer to cool your vehicle. Learn how the system keeps you comfortable mile after mile.
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20% off $150+: Valid on regularly priced in-stock items for Ship to Home orders that when purchased together total $150 or more (before tax, shipping and discount) on the OReillyAuto.com website only. Excludes AIRAID, B&M, Bully Dog, DeVilbiss, Edelbrock, Flowmaster, Holley, Hurst, Ingersoll-Rand, K&N, MSD, SCT, and Spectre items.
To Redeem Offer: Add qualifying items totaling $150 or more to your shopping cart and select “Ship” as your delivery method. Enter promo code SUNNY20 in the cart. The total in your shopping cart will be adjusted after promo code is applied. Excluded brands contribute toward minimum purchase amount to qualify for offer but are not eligible for discount. (Maximum $50.00 Discount.) Valid Thursday, May 29th to Monday, June 2nd, 2025 (11:59pm Hawaii Time Zone). Coupon code is not redeemable for cash, is nontransferable and cannot be replaced if lost or stolen. Not valid on same-day delivery orders. Void if copied, transferred or where prohibited by law. Customer pays sales tax and shipping fees.
Offer subject to adjustment due to returns, cancellations and exchanges. Additional taxes and duties may apply. Not valid with any other promotional gift with purchase. Offer may be modified or discontinued at any time without notice.
Offer Terms: Offer does not apply to gift card orders. Offer does not apply to Lead-Acid batteries. Cannot be used in combination with any other certificates, offers, or discounts or for payment on account. Not valid on previous purchases or store purchases. Shipping & handling and taxes do not qualify towards the minimum purchase. Valid for retail customers only. OReillyAuto.com only ships orders within the U.S.
Excluded Brands: Offer does not apply to AIRAID, B&M, Bully Dog, DeVilbiss, Edelbrock, Flowmaster, Holley, Hurst, Ingersoll-Rand, K&N, MSD, SCT, and Spectre items.
Featured Products: Get a $100 Gift Card After Rebate with purchase of an A/C Compressor, Accumulator/Drier, Expansion Device, AND Condenser; Get a $50 Gift Card After Rebate with purchase of an A/C Compressor, Accumulator/Drier, and Expansion Device; Save $10 on Power Torque 200-Pc. ¼", ⅜", and ½" Mechanic’s Tool Set, PTT GM4323; Save $20 on Power Torque Low Profile 3-Ton Floor Jack, PTT PT34699, Plus O’Rewards Members Get a $5 Reward*; Power Torque 3-Pc. Retrieval Set, PTT PTT9022, $11.99 Set; Save $4 on Rislone Hy-per Cool Super Coolant Radiator Coolant, HPL HPC100, 16 oz.; Berryman B-12 Chemtool Fuel System & Injector Cleaner, BRY 0116, 15 oz., $5.99 Each, 3x Points. Prices effective 5/25/25 – 6/24/25. Prices and savings may vary.
* O’Rewards reward generated only for members who have a zero to positive point balance.
