AC Replacement & Repair in Boise, ID
Whether the system needs fixing or replacing, what helps is a written number for your house. Tell us what you have and we will get you a quote from a vetted Treasure Valley contractor. Free, and you are not committing to anything.
In Boise, a new central air conditioner installed typically runs $5,400-8,900, and a matched high-efficiency system with a variable-speed air handler reaches $11,800.
Converting an old evaporative (swamp) cooler house to central air runs $6,800-14,500, because the ductwork usually has to be reworked as well.
Boise summers now bring weeks of wildfire smoke, which is the reason filtration has stopped being an optional extra on new systems here.
Repair it, or replace it?
The honest rule of thumb is about age and refrigerant, not about the part that failed. In the Treasure Valley there is one extra question nobody else has to ask, which is whether you are still on a swamp cooler.
- Under about ten years old and the repair is a few hundred dollars - fix it. Capacitors, contactors and fan motors are normal maintenance, not a reason to replace a system.
- Fifteen years or older and it needs a compressor or a coil - that is usually the moment to price a replacement instead. You would be putting the most expensive part into the oldest machine.
- It still runs R-22 refrigerant - that has been phased out, so a leak repair means paying a lot for a refrigerant that is only getting scarcer.
- You are still on an evaporative cooler - Boise is dry enough that they work, but they lose to humidity in monsoon weeks and they cannot filter smoke. Worth pricing the conversion properly rather than piece by piece.
- The house has hot rooms the system never fixes - that is usually ducting or sizing, and replacing the box alone will not solve it. Ask for a load calculation, not a like-for-like swap.
High desert changes what fails
Most air conditioning advice is written for humid climates and quietly misleads people here. Boise sits at about 2,700 feet in high desert, and the failures we actually see reflect that.
Dry air means the classic humid-climate problems - clogged condensate drains, mould in ductwork, systems that cool but leave the house clammy - barely register. What we get instead is airflow: filters loaded far faster than the schedule on the box suggests, and equipment running long hard cycles through a valley summer that regularly climbs past 95 degrees.
- Filters loading far faster than the three month schedule on the box during a smoke stretch
- Weak cooling that turns out to be airflow rather than refrigerant
- A swamp cooler that stops keeping up when late summer humidity rises
- A condenser packed with cottonwood fluff that cannot dump heat
The wildfire summer problem
In smoke years, western wildfire particulate settles into the Treasure Valley and stays for weeks. Smoke particles are far smaller than household dust and they load a filter quickly - a filter rated to last three months can choke in a few weeks.
A choked filter starves airflow across the evaporator coil, and starved airflow is the leading cause of both weak cooling and frozen coils here. During a smoke stretch, checking the filter monthly is not being fussy; it is the difference between a $20 filter and a $900-2,000 coil.
The four calls we get most
- Running but not cooling - usually a capacitor, a contactor, or refrigerant that has leaked out.
- Weak cooling through a smoke stretch - almost always a filter that loaded up far faster than anyone expected.
- Swamp cooler not keeping up in late summer - it is doing what evaporative coolers do when humidity rises, not necessarily broken.
- Ice on the copper line - a frozen coil, and the correct first move is to turn it off and let it thaw.
Areas we cover
- Boise
- Meridian
- Nampa
- Eagle
- Kuna
- Star
- Garden City
Get a written quote for your system
Tell us roughly the age of the system, the square footage, and whether you have ducts or a swamp cooler. We will match you with a vetted Treasure Valley contractor who quotes in writing. No charge for the match, no obligation, and we do not sell your details to four companies.
Or call (877) 701-2518
Common questions
Why is my AC running but not cooling?
In the Treasure Valley, check the filter before anything else. During a smoke summer a filter rated for three months can choke in weeks, and starved airflow is the leading cause of weak cooling here.
How long does an air conditioner last?
Manufacturers quote 15 to 20 years and a well-maintained system can reach 20 to 25. Neglect cuts that to 10 to 12, and in this dry dusty valley the neglect that matters most is filters and a clogged condenser.
How often should I change the filter in Boise?
Every three months is the usual guidance, but during a smoke summer check it monthly. Hold it up to a light - if you cannot see light through it, it is done regardless of the date.
How fast can someone get here during a heat wave?
In normal conditions most Boise and Meridian calls are reached within 2-4 hours. During a genuine heat wave every HVAC company in the valley is saturated and same-day becomes next-day.
Is it worth repairing a 15-year-old system?
It depends which part failed. A $160-320 capacitor on a 15-year-old unit is still worth doing. A $1,350-2,800 compressor on the same unit usually is not, because you are spending a quarter of a replacement on something near the end of its life.