HeatingCoolingElectricalPlumbingAir quality
Every service A-One offers
Heating, cooling, electrical, plumbing and indoor air quality, all from one shop in Pasco. Pick the job that matches your problem, or call and describe it and the office will point you to the right crew.
Heating & Cooling
Heating and cooling services
Air conditioners, furnaces, heat pumps and ductless systems, at homes and at businesses. Summers here run past 100 degrees and winter brings hard cold snaps, so one system gets worked in both directions.
A-One repairs, maintains and installs, and it installs Lennox, Amana, Daikin and Goodman equipment.

- AC repair
When the air conditioner quits in a Tri-Cities heat wave, A-One measures the system, finds the part that actually failed and fixes that. Emergency service runs 24/7.
- AC maintenance and tune-up
A yearly AC tune-up from A-One covers the system from the outdoor coil to the condensate drain, before dust and 100 degree afternoons turn a weak part into a breakdown.
- AC replacement and installation
A-One sizes the system to the house, checks the ducts and installs Amana, Daikin or Goodman equipment. A-One is also a Lennox Premier Dealer.
- Heating repair
A-One checks gas, venting and safety controls first, then finds the exact part that failed in your furnace or heat pump. Emergency service runs 24/7.
- Heating maintenance
A heating tune-up from A-One follows the furnace or heat pump from thermostat to exhaust, so weak parts are found in the fall and not on the coldest night.
- Heat pump and gas furnace installation
A-One sizes a heat pump or furnace to the house, checks the ducts and installs it with a tested line set and gas connections. Ask about rebates and financing.
- Ductless heating and cooling
A ductless system from A-One heats and cools the rooms your ducts never reached, with a thin line set to the outdoor unit and separate control in each space.
Electrical
Electrical services
A-One's electricians inspect, install, upgrade panels and repair, at homes and at businesses. The work runs from a flickering light or a dead outlet to a panel that has to be replaced.
Backup generators and whole-home rewiring are on the list too.
- Electrical inspection
A-One's electricians go through the service, the panel, the wiring and the outlets, then give you a written report with each finding ranked by priority. Homes, shops and commercial buildings across the Tri-Cities.
- Electrical installation
New circuits, outlets, lighting and dedicated feeds for a remodel, a garage conversion or a shop building, installed by A-One's electricians. One call covers homes and commercial spaces across the Tri-Cities.
- Electrical panel upgrades
A-One's electricians replace crowded, aging panels and service equipment so the house can carry modern loads like air conditioning, EV chargers and hot tubs. Serving homes across the Tri-Cities.
- Electrical repair
Dead outlets, flickering lights and breakers that will not hold, traced and repaired by A-One's electricians. 24/7 emergency electrical service across the Tri-Cities.
Plumbing
Plumbing services
Plumbing is the newest trade on the shop sign. The crew clears drains, finds leaks, repairs and replaces pipes, fixtures and toilets, and handles emergency plumbing.
It also installs, repairs and replaces tank and tankless water heaters. Tri-Cities water is hard, and hard water builds scale in a tank and on a fixture.
- Drain clearing
Slow sinks, backed-up tubs and floor drains that will not clear. A-One's plumbers find where the clog sits, clear it with the right tool and tell you why it formed.
- Emergency plumbing
A burst pipe, a backed-up drain or a water heater dumping onto the floor. A-One offers 24/7 emergency plumbing for homes and businesses across the Tri-Cities.
- Faucets and fixtures
Dripping faucets, running toilets and stiff valves. A-One repairs the worn part where that is enough and replaces the fixture where it is not.
- Leak detection
A water bill that climbs, a warm patch on the floor or a meter that keeps turning. A-One locates the leak before anyone opens a wall, then repairs it.
- Plumbing repair
Leaking pipes, failed connectors, stubborn clogs and water heater trouble. A-One's plumbers find the cause, explain the options and repair it.
- Tankless water heaters
On-demand hot water sized to your house. A-One plans the install, services existing units and descales heat exchangers clogged by hard Tri-Cities water.
- Water heater repair
No hot water, a rumbling tank, rusty water or a puddle at the base. A-One tests the heater before replacing anything and tells you if it is worth repairing.
- Water heater replacement
When the tank is done, A-One sizes the new heater to your household, sets it with new connectors and straps, and checks every joint before we leave.
Indoor Air Quality
Indoor air quality services
Dust, smoke and stale air travel through leaky ducts as easily as through open doors. A-One cleans ducts, replaces them, and seals leaks with Aeroseal.
Air purifiers and system sterilizers are part of the work as well.
- Air duct cleaning
A-One cleans supply and return ducts under negative pressure, so the dust that wind and harvest push into a Tri-Cities house leaves through the vacuum instead of the registers.
- Air duct replacement
When flex duct is crushed, torn or too small for the system, A-One sizes a new supply and return run, hangs it with sealed joints and tests it before the crew leaves.
- Air duct sealing and repair
A-One finds where conditioned air escapes with duct leakage testing, repairs what sealant cannot bridge, and seals the rest from the inside as an Aeroseal certified dealer.
RefrigerationSince 1980
Commercial refrigeration is where A-One started
Al and Carol Hagen opened A-One in 1980 as a small commercial refrigeration business. Homes came next, then heating and cooling, then electrical, then plumbing.
The commercial side never went away. A-One says its technicians handle installs, maintenance and repairs on commercial HVAC and refrigeration systems of all sizes. Call the shop to talk through what you have.
Running a walk-in, a rooftop unit or a kitchen line? Call the shop and say what it is.
Call (509) 586-7613