Turn-KeyPackage Unit Installation
- Rooftop or ground-mount swap
- Curb adapter / transition fab when needed
- Crane rental coordination
- Permit, electrical, gas line tie-in
- Smart thermostat included

RTU · Residential Package · Gas Pack · Heat Pump Package
Install, repair, and maintain package units across the Inland Empire — rooftop and ground-mount, gas-pack or heat-pump, residential or light commercial.
Package units consolidate the AC condenser, evaporator coil, blower, and (in gas-pack models) a furnace into one outdoor cabinet — rooftop on most light-commercial buildings, ground-mount on a concrete pad next to single-story residential. They dominate Inland Empire manufactured housing, single-story California ranch homes built without attic plenum space, and just about every restaurant, strip-center retail bay, and small office across Fontana, Rancho Cucamonga, San Bernardino, Riverside, and the surrounding cities. Tech On Call installs, repairs, and maintains package units across both Inland Empire counties — residential ground-mount, manufactured home swap-outs, and commercial rooftop RTUs with crane coordination when needed.
Package units fail in specific patterns shaped by where they live. Rooftop units cook in summer sun — capacitors, contactors, and fan motors die earlier than equivalent split-system parts. Condensate drain pans rust through and leak into the roof or roof curb. Belt-drive blowers on older RTUs throw belts or seize bearings. Gas-pack units add burner and heat-exchanger inspection to the failure mix. We diagnose every brand — Carrier, Trane, Lennox, Goodman, York, Rheem, Bryant — with the safety equipment and rooftop access required for code-compliant work.
Replacement is where package units get interesting. A direct swap on an existing curb or pad runs $9,000–$16,000 residential, more for commercial RTUs with crane rental and gas/electrical tie-ins. Curb adapters fabricate when sizes don't match exactly. We handle permits, HERS testing where required, and old-equipment EPA refrigerant recovery. If you're considering an upgrade from gas-pack to heat-pump package see heat pumps for rebate-eligible options, or commercial HVAC for restaurant and retail RTU service.
No Cool / Weak Airflow
Capacitor, contactor, or evaporator coil restriction. We diagnose on the roof and fix the same visit.
Burned-Up Compressor
Roof-mount package units cook in summer sun. Failed compressors are the most common end-of-life call.
Bad Blower Or Motor
Belt-drive blowers, ECM motors, and bearings wear out — affordable repair when caught early.
Rusty Cabinet Or Pan
Leaking condensate pans rust the cabinet floor. We patch or recommend replacement before water damages the roof.
Gas-Pack Burner Issues
Cracked heat exchanger, failed igniter, or flame sensor coated. We inspect gas-pack heating side every service call.
Economizer Stuck
Commercial RTU economizers freeze open or closed — economy mode wastes energy or fails altogether. We rebuild or replace.
Thermostat Communication
RTU communicating thermostat won't talk to control board. We trace control wiring and re-pair when needed.
Frozen Coil On Rooftop
Restricted return airflow or low refrigerant ices the indoor coil. We thaw, repair, and address the root cause.
Turn-KeyPackage Unit Installation
Same-DayPackage Unit Repair
Residential and light-commercial — we service every package unit brand sold in California.
Single-Story Homes
California ranch homes without attic space — package unit on a pad serves the entire footprint.
Manufactured Homes
Most manufactured homes were built with package units — repair or replace with sized equipment.
Light Commercial
Restaurants, retail, small office — rooftop package units (RTUs) are the standard light-commercial install.
Gas-Pack Units
Combined AC + gas furnace in one cabinet — common in older single-story California homes.
Heat Pump Packages
All-electric package units with cooling and heating in one cabinet — rebate eligible.
Replacement Match-Ups
Old package unit failed? We size and quote the swap-out with matching curb and gas connections.
Call & Schedule
A real dispatcher answers — no phone tree. We confirm same-day or next-morning ETA and text the tech's name and photo before arrival.
On-Site Diagnostic
Flat-rate, no-surprise diagnostic. Tech checks refrigerant pressures, electrical, airflow, and controls — then explains what's failing in plain English.
Written Quote
You see the repair (or replacement) price before any work starts. Diagnostic fee credits toward the repair when you proceed.
Repair Or Install
Most repairs are completed same-visit — we stock capacitors, contactors, motors, and refrigerant on the truck. Larger jobs are scheduled within 24–48 hours.
Test & Document
We verify supply temps, refrigerant subcooling/superheat, and amp draw. You get a written invoice with everything we did, parts used, and warranty terms.

Inland Empire · Package Units
Rooftop Ready. Same-Day.
EPA 608 Certified
Universal-certified techs on every repair, install, and recovery — R-410A, R-32, R-454B handled correctly.
Same-Day Response
When the AC quits in the Inland Empire heat, you don't have hours. Same-day dispatch across both counties.
Flat Pricing
Diagnostic and repair quoted before any work begins. The number on-site is the number on the invoice.
Maintenance Plans
Spring tune-ups, filter swaps, and priority dispatch on annual plans built for desert summers.
View PlansAC Installation
All install types — central, mini-split, heat pump, and package.
AC Repair
Same-day diagnostic and repair on every system.
Heat Pumps
Heat-pump package units qualify for federal IRA rebates — compare side-by-side.
Commercial HVAC
Rooftop RTU service for restaurants, retail, and light commercial.
Service Area
Riverside County
Cities
Don't see your city? Call (909) 239-6364 — we likely cover your area.
What's a package unit?
An all-in-one outdoor cabinet containing the AC condenser, evaporator coil, blower, and (in gas-pack models) furnace — installed on the roof or on a ground pad rather than split between outdoor and indoor units.
How much does package unit replacement cost?
Residential replacement $9,000–$16,000 installed. Commercial RTU replacement varies widely with crane rental and tenant coordination — we quote after a rooftop walkthrough.
What's the lifespan of a package unit?
12–18 years with regular maintenance. Roof-mount units in desert climates (Coachella Valley, High Desert) run on the shorter end due to sun and heat exposure.
Can you replace just the package unit on the existing curb?
Usually yes — direct swap with matching curb adapter or new transition collars where needed. We handle permits and HERS testing.
Do you do gas-pack units?
Yes. Combined AC + gas furnace package units — service, repair, and replacement with full gas line tie-in and heat-exchanger inspection.
Do you do commercial rooftop units (RTUs)?
Yes. Commercial RTUs are a daily service for us — see commercial services.
Package unit vs split system — which is better?
Depends on the building. Single-story California ranch homes and manufactured homes that were built for package units are simpler to keep as package. Multi-story homes with existing attic plenums usually do better with split systems.
Can a heat-pump package replace my gas-pack?
Yes — and a heat-pump package qualifies for federal IRA tax credits and California utility rebates a gas-pack doesn't. We'll quote both side-by-side with rebate math.
What cities in the Inland Empire do you serve?
Every city in Riverside and San Bernardino County — Riverside, San Bernardino, Fontana, Rancho Cucamonga, Ontario, Corona, Moreno Valley, Temecula, Murrieta, Redlands, Hesperia, Victorville, and the Coachella Valley. See the full service-area list at the bottom of this page.
Do you warranty your work?
Every repair carries a workmanship warranty, and we register manufacturer warranties on every install. Most major equipment ships with a 10-year parts warranty when registered within 60 days — we handle that paperwork for you.
Do you offer financing?
Yes — financing is available on qualifying installs and replacements. We'll walk through monthly payment options before you commit to anything.