Honest HVAC answers, before you spend a dollar.

It depends on the outdoor temperature. In Phoenix's dry heat, your AC's load tracks the actual air temperature — the gap between the outdoor temp and your ~75°F setpoint. Once it's over 100°F your system runs long cycles, and past 110°F it runs almost non-stop. RM III's live cooling-demand widget reads current Metro Phoenix conditions and translates them into how hard your system is likely working today.

If the indoor fan blows but the air never gets cold, the system usually can't move heat. The most common causes are low refrigerant from a leak or a weak run capacitor (a ~$30–$60 part); if the outdoor condenser is silent, suspect a tripped breaker or failed contactor. In triple-digit heat this is worth a same-day diagnostic — RM III offers free estimates and often same-day service.

A useful rule of thumb is to multiply your system's age by the cost of the repair in front of you. If that number is over about $5,000, replacement is usually the better value. Add in age (most desert AC units last 10–15 years), how often it's been breaking down, and whether it still uses phased-out R-22 refrigerant. RM III gives a free second opinion so you can decide with honest numbers, not pressure.

Most central AC systems in Metro Phoenix last about 10 to 15 years, shorter than the national average because of how hard they run in the heat. Regular maintenance extends that life. Once a unit is past ~12 years and facing a major repair, it's worth having a licensed tech weigh repair against replacement — which is exactly what RM III's free second opinion is for.

Most single-system AC or heat-pump replacements for a typical Phoenix home run about $7,000 to $10,000 installed. Premium variable-speed systems run higher — around $12,300 and up. Your exact price depends on system size, efficiency (SEER2), and ductwork, so these are typical ranges, not a quote. RM III gives free in-home estimates and a free second opinion with honest, no-commission pricing.

A seasonal AC tune-up typically runs about $79 to $150. Common repairs — like a run capacitor, contactor, or fan motor — usually fall between roughly $150 and $1,200 depending on the part and refrigerant; refrigerant leaks and compressor work run higher. RM III shows you the price before any work starts, with no commission-driven upsells.

SRP customers can earn Cool Cash — up to $1,125, at $225 per ton for variable-capacity systems — on qualifying high-efficiency equipment (generally SEER2 15.2+) installed by April 30, 2027. Income-qualified households may add up to $8,000 toward a heat pump through the federal HEAR / Efficiency Arizona program. (The federal 25C tax credit ended December 31, 2025.) RM III files SRP paperwork for you.

Yes. For SRP Cool Cash we file the rebate paperwork in-house as part of your install — no third-party broker. We'll also point you to the income-qualified federal HEAR / Efficiency Arizona program and what you need to claim it, so the savings actually land.