Heating
Furnace repair, install & maintenance
Furnace not heating, on its last legs, or due for replacement. Same-day repair, written quotes, all major brands.
Diamond is the Treasure Valley's most-reviewed home services team. One call gets you a licensed technician for any of the four trades — no contractor juggling, no finger-pointing, no surprises.
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 claimReplace your complete heating & cooling system with a premium high-efficiency setup and save $1,200.
Call to claimKeep your water heater efficient and safe with a full flush and safety inspection - just $79.
Call to claimUpgrade your electrical panel for a safer, higher-capacity home - now $250 off.
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 the service you need - or just call us and we'll route you to the right technician.
Furnace repair, install & maintenance
Furnace not heating, on its last legs, or due for replacement. Same-day repair, written quotes, all major brands.
AC repair, install & full HVAC
AC blowing warm, won't start, or about to retire. Same-day diagnosis. Free in-home estimate on new systems.
Emergency, water heaters & drains
Burst pipe, leak, no hot water, or a clogged drain. Live 24/7 dispatch, same-day service in most cases.
Panels, outlets, EV chargers & rewires
Breaker tripping, flickering lights, panel upgrade, EV charger install. Licensed electricians on call.
We answer live, dispatch live, and follow up live. Tap the button to talk to a real Diamond team member right now.
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.
Diamond isn't a private-equity rollup. It's a family-run Treasure Valley business - founded in 1999 and built around a single idea: do home services the way homeowners deserve.
Rick opened Diamond's doors in March 1999, focused on new construction. He earned a reputation across the Treasure Valley for solving the hot-bonus-room problem nobody else could fix - and for treating customers fairly when others didn't.
In 2009, Rick's wife and business partner Sue Ellen joined full-time. Together they pivoted from new construction to residential service - because they saw an industry that, too often, didn't take care of its customers.
“We wanted clients to experience excellence and be 100% satisfied with the service they receive. We call it the Diamond Difference.”
Rick founds Diamond Heating & Cooling, focused on residential new construction.
Sue Ellen joins full-time. Diamond pivots to residential service - and to the standard that defines it today.
Awarded the BBB Torch Award for Ethics, recognizing honest, ethical business practice - won again in 2022.
Named Idaho's Best HVAC Company seven years running, plus Idaho's Best Contractor 2022.
"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.
Heating, cooling, plumbing, electrical - one phone call gets you a Diamond technician on the way. We answer live, 24/7.