AC not cooling? Blowing warm air? Strange noises? Diamond's HVAC technicians diagnose and repair your AC - same-day in most cases, with honest repair-vs-replace advice.
Limited-time summer offers from Diamond - just mention the offer when you call.
Upgrade to a high-efficiency air conditioner, professionally sized and installed - and keep $600 in your pocket this summer.
Call to claimReplacing a system that's 10+ years old? Get $750 toward your new one. ($500 trade-in for a working system.)
Call to claimAn $895 value - a full decade of labor coverage included when Diamond installs your new system.
Call to claimOffers valid June–August 2026. Cannot be combined with other offers. Some restrictions apply; ask for full details when you call. Financing subject to credit approval.
Tap your symptom - we'll connect you to an HVAC technician on our line.
Something else going on? Call 208-231-1635 - we handle every kind of AC issue.
Tell us what your AC is doing - not cooling, not turning on, making noises. We dispatch an experienced HVAC technician.
On-site diagnosis of your system - not guesswork. Performance check, refrigerant, electrical, and airflow verified before we quote.
If it makes sense to repair, we repair and test. If your system is genuinely past it, we'll say why - with the numbers. No pressure.
AC repair is the service where 'diagnosis' becomes a sales pitch for a $10,000 replacement. Here's how Diamond is different.
Fully-stocked trucks, experienced technicians, and all the common replacement parts mean most AC repairs are one-visit, not a return trip.
We diagnose the actual cause, not just the symptom. Fixing a tripped breaker without finding what caused it just means you'll be calling us again next week.
If your system is 18 years old and the compressor is failing, we'll say so. If it's a $150 fix on a 6-year-old unit, we'll say that too. Your numbers, your call.
Diamond was built by Rick and Sue Ellen in 1999 to do home services the way homeowners actually deserve - properly trained technicians, your-quote-is-your-price honesty, and one accountable team for every trade.
Idaho's Best HVAC Company seven years running (2020–2026), Idaho's Best Contractor 2022, and the BBB Torch Award for Ethics in 2014 and 2022.
We answer live and dispatch same-day in most cases. No answering service, no callback queue - just a real person ready to help.
"We were impressed with their up-front and clear pricing. John was on time, and explained everything necessary to do with no pressure to do it."
"Diamond Heating and Cooling was very knowledgeable and professional from start to finish. Highly recommended."
"Without a doubt, Diamond Heating and Cooling is the best possible choice you can make when deciding on a company you can rely on to provide excellent service."
Diamond is based in Garden City and serves homeowners across the Treasure Valley & surrounding areas.
Not sure if you're in our area? Call 208-231-1635 - we'll confirm on the line.
Tap the phone to talk live now. Real licensed technicians, your-quote-is-your-price honesty, no answering service.
Same-day AC service in most cases. Honest diagnostics. Repair first. Idaho's Best HVAC Company seven years running.
