OKC summers run AC units 14+ hours a day, and the second week of triple-digit heat is when tired systems fail. Here is what a replacement costs, when to repair instead, and how to claim OG&E rebates.
A complete 3-ton system replacement (AC + furnace) typically runs $6,500–$11,000 installed in the Oklahoma City metro, including refrigerant lines, electrical, and warranty. Adding a heat pump runs $1,500–$3,000 more.
Replace rather than repair when all three are true: the unit is 12+ years old, the repair quote is over $1,500, and it still uses R-22 refrigerant (now $150+/lb when available). If only one is true, a repair is usually the smart call. A reputable contractor will quote both so you can compare.
Bigger is not better. A 2,000 sqft single-story OKC home typically needs a 3.5–4 ton unit; an oversized system short-cycles, leaving the house humid and clammy. Insist on a Manual J load calculation rather than a rule-of-thumb guess.
A vetted local HVAC pro will quote both a tune-up and a replacement on the same visit so you can compare honestly. Get a free HVAC tune-up or replacement quote →
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