Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Ameristar Construction in Upland, CA | Stallion Contractors
We provide independent Ameristar service across Upland, and the work here splits two ways: downtown bungalows retrofitted with aging Ameristar condensers on undersized panels, and 91784 foothill homes running newer Ameristar systems against wildfire review and slope constraints. We’re not an Ameristar-authorized dealer, and our crew works on this equipment because we’ve torn into it across Upland’s citrus-belt blocks for years, not because the factory sent us. Whether it’s a failed M4AC capacitor in July heat or a full kitchen remodel where Ameristar equipment sits behind new cabinetry, call (855) 600-3192 and we’ll give you a straight read on what’s actually wrong.

Why Upland Residents Choose Us for Ameristar Service
Stallion Contractors is a licensed general contractor, led by Ruben Montoya, and our scope covers what most HVAC shops never touch: the roofline, the kitchen, the bathroom, and the electrical panel that the Ameristar unit depends on. That matters in Upland, where a condenser swap on a 1950s ranch home often turns into a panel replacement, and where a kitchen remodel on Euclid Avenue means working around an aging Ameristar air handler someone shoehorned into a hallway closet decades ago. Ruben grew up in Colton and trained at San Bernardino Valley College, and he still walks every Upland job himself before quoting — the same way we deliver Ameristar service in Claremont. We stock OEM-equivalent Ameristar parts – capacitors, contactors, fan motors, igniters, cased coils – so most repairs go back to factory spec within a day or two.
What we don’t do is pretend to be Ameristar. We’re an independent contractor, not authorized, sponsored, or warranty-backed by Ameristar. For homeowners who want one team managing full-scope work, our Ameristar sales & service capability fits under the same contract as roofing, siding, and fencing.
Styles & brands we work with







Common Ameristar Construction Problems We Solve in Upland
- Condenser fan-motor and capacitor failures on M4AC units. Upland’s inland summer heat pushes these units to long cycles, and a condenser pad sitting in full sun on a downtown lot bakes capacitors until they fail. We replace with OEM-equivalent parts, not whatever’s on the truck.
- Leaking evaporator and cased coils on M4TXB systems. Fifteen-plus-year-old Ameristar coils in Upland corrode where dry, dusty inland air meets condensation. Refrigerant charge drops, the unit runs constantly, and the house never cools. We test the charge before quoting anything.
- Clogged condensate drain lines and pan overflow. After a Santa Ana event, dust gets pulled into the return and settles in the drain pan. Ameristar air handlers mounted in tight attic spaces or hall closets in Upland’s older homes are especially prone to this.
- Cracked heat-exchanger sections on aging Ameristar 80% gas furnaces. The M801P family gets pulled back into service for cool foothill nights in 91784, then fails when a crack goes unnoticed from the prior winter. We scope the heat exchanger on every furnace call, not just the ones that set off the CO alarm.
- Undersized electrical panels behind Ameristar changeouts. This one’s specific to Upland’s downtown and central housing stock. A 1950s bungalow with a 60-amp panel can’t carry a modern Ameristar heat pump, and we’re the contractor who can quote the panel upgrade alongside the HVAC work rather than kicking you to a second vendor.
Ameristar Service in Upland: What Local Conditions Mean for Your Equipment
The split between Upland’s two housing tiers drives everything about how Ameristar equipment fails and what it costs to fix. Downtown and central Upland – the 1920s through 1960s bungalows and ranch homes near Euclid and Foothill – were built before central air was standard. Ameristar condensers and air handlers in these homes were retrofitted in, often with undersized panels, undersized ducts, and tight closet installs that nobody would permit today. When an Ameristar M4AC condenser fails on one of these downtown lots, the repair is rarely JUST the capacitor or contactor. The disconnect is old. The wire gauge is marginal. The panel is full. A $300 capacitor call can turn into a $3,500 panel replacement if you want to do it right and pass inspection. Drive a mile north into 91784, and the same Ameristar coil leak on a 1980s foothill tract home is a straightforward coil replacement because the electrical service was built for modern loads. Same brand, same failure, two completely different scopes and bills. We quote both honestly, and we never bury the panel issue to make the HVAC number look smaller.
On a 1958 ranch house off a tight downtown Upland lot, our tech pulled a tired Ameristar M4AC condenser that had been short-cycling through July heat and found a failed run capacitor and a burnt contactor, with the original panel too small to carry a modern heat-pump changeout. We replaced the capacitor and contactor to get cooling back on, then quoted a panel upgrade alongside the eventual system swap so the homeowners weren’t surprised. On a 91784 foothill property a few miles north, the same Ameristar coil-leak call was a straight coil replacement because the electrical service was already modern.
Ameristar Models & Products We Service in Upland
We work on the Ameristar M4AC split-system air conditioners, M4HP heat pumps, M4TXB and M4 cased coils, and the M801P/M801V 80% single-stage gas furnace family. Most Upland calls involve the M4AC condenser and M801P furnace pairing, which shows up constantly in 1970s-1990s tract homes across 91786 and 91784. On parts, we use OEM-equivalent Ameristar components rather than universal aftermarket substitutes – the contactor and capacitor go back to factory spec, not close enough. For a 15-plus-year-old Ameristar condenser with a coil leak and a dying compressor, we’ll tell you the repair window is closed and quote a replacement. For a five-year-old unit with a failed fan motor, that’s a parts-and-labor fix done right. The numbers decide, not the sales target.
See the difference
Before
After
Before
After
Before
AfterAmeristar Service Pricing in Upland
What should you budget for Ameristar work in Upland? Here are the numbers we quote, calibrated to this market:
- Ameristar condenser or furnace repair (capacitor, contactor, igniter): $400-$1,800
- Evaporator or cased coil replacement (M4TXB): $2,500-$5,500 depending on access
- Full AC condenser changeout (M4AC): $4,500-$9,000
- Ameristar furnace replacement (M801P family): $3,500-$7,500
- Panel upgrade alongside HVAC changeout (downtown Upland homes especially): $2,500-$5,000
- Kitchen remodel where Ameristar equipment is relocated or reworked: $14,000-$45,000
- Bathroom remodel including exhaust/ventilation work around Ameristar returns: $9,000-$28,000
- Roof replacement with Ameristar condenser removal and reset: $8,000-$20,000
Every quote starts with a free on-site estimate. We check the panel, the disconnect, the line set, and the duct connections, then give you a written line-item scope. Call (855) 600-3192 to schedule yours – you’ll know the real number before you commit to anything.
Serving Upland, CA — Our Local Coverage Area
We’re based in the Upland area and also handle San Antonio Heights Ameristar service, so we know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Ameristar Construction in Upland
No. We’re an independent contractor serving Upland, not authorized, sponsored, or warranty-backed by Ameristar. We service Ameristar equipment because we know its internals and stock OEM-equivalent parts, which means your repair goes back to factory spec regardless of our authorization status. If you have an active Ameristar manufacturer warranty, we’ll flag it and let you decide whether to go through the authorized channel.
We use OEM-equivalent Ameristar parts: capacitors, contactors, fan motors, igniters, and cased coils matched to the M4AC, M4HP, and M801P families. Not universal fits, not whatever’s left on the truck. For a Upland homeowner with a 12-year-old condenser, that matters because the wrong capacitor spec shortens the life of the compressor it’s feeding. Call (855) 600-3192 and we’ll tell you exactly what part your unit needs.
Most capacitor, contactor, and igniter calls are done in one visit – the parts are on our trucks. Coil replacements and full condenser changeouts take one to two days. Panel upgrades, which are common on downtown Upland Ameristar retrofits and similar to what we see with Ameristar repair in Montclair, add one to two days with city inspection scheduling. We quote a finish date with the estimate, and it holds unless the wall opens up to something nobody could see from outside. For a free estimate on your Ameristar repair, call (855) 600-3192.
We service the M4AC split-system air conditioners, M4HP heat pumps, M4TXB and M4 cased coils, and the 80% single-stage M801P/M801V gas furnace family. If your Upland home has an Ameristar unit from the 1990s or early 2000s, it’s almost certainly one of these lines. And if you’re mid-remodel and the Ameristar equipment sits behind new cabinetry or inside a wall we’re moving, we manage that coordination under one contract instead of passing you between three contractors.
Repair work like a capacitor, contactor, or igniter replacement runs $400-$1,800. Coil work, which involves refrigerant recovery and recharge, lands between $2,500 and $5,500 depending on access in your attic or closet. Full condenser replacement on an M4AC is $4,500-$9,000. Downtown Upland homes frequently add $2,500-$5,000 for a panel upgrade when the electrical service can’t carry a modern Ameristar heat pump. Call (855) 600-3192 for an exact quote – estimates are free.
Directly, and more than most homeowners expect. When we reroof a Upland home, the Ameristar condenser gets disconnected, reset, and reconnected to spec – we don’t leave it on the pad with a kinked line set. During a kitchen remodel, the air handler, return duct, and condensate line often have to move or get rebalanced around new cabinetry — just as we do on Rancho Cucamonga Ameristar service calls. Having one general contractor handle the Ameristar equipment alongside the remodel means the HVAC work is quoted correctly the first time, not added as a change order from a sub we called in mid-job. Call (855) 600-3192 and we’ll walk your project with the HVAC scope included.
Service Areas Near Upland
We run Ameristar service across Upland’s 91784, 91785, and 91786 ZIP codes, plus the surrounding foothill and valley communities. Our trucks cover Upland service area calls all week. We also work Ameristar service in Sunnyslope, Ameristar service in Yucaipa, Colton, San Antonio Heights, Loma Linda, and Redlands when the work takes us down the hill or up the 210.
Book Your Ameristar Service in Upland Today
Call (855) 600-3192 to schedule your free Ameristar estimate in Upland. We’ll tell you what’s wrong, what it costs to fix it right, and whether the equipment or the panel should be addressed first. Written line-item quote. One contractor. Every trade.
Written by Ruben Montoya, Owner at Stallion Contractors, serving Upland and the Inland Empire. Good work doesn’t need a sales pitch – it needs the right materials and someone who knows what they’re doing.