The following questions and answers cover the most common HVAC concerns for homeowners and businesses in the Treasure Valley, including Caldwell, Nampa, Boise, Meridian, Kuna, Eagle, Emmett, and surrounding communities in Idaho. Topics include furnace repair, furnace replacement, air conditioner repair, air conditioner replacement, heat pump service, duct cleaning, indoor air quality, emergency HVAC service, and maintenance.

Greens Heating & Air Conditioning has served this community for over 35 years, and these answers reflect the same straightforward approach we bring to every service call — giving our neighbors the information they need to make confident decisions, without pressure to spend more than necessary. For anything not covered here, we're reachable at (208) 465-0859.

About Greens Heating

How long has Greens Heating been in business?

Greens Heating & Air Conditioning has served the Treasure Valley for over 35 years and remains a locally owned and operated business. The company was founded in 1990 and has been under consistent local ownership ever since.

Is Greens Heating licensed and insured in Idaho?

Yes. For full transparency, Greens Heating & Air Conditioning holds the following Idaho licenses:

  • General Contracting License: RCE-9345
  • HVAC License: HVC-C-1549

Both licenses are current, and the company carries full insurance coverage.

What areas does Greens Heating serve?

Greens Heating & Air Conditioning serves homeowners and businesses throughout the Treasure Valley, including:

  • Boise
  • Caldwell
  • Eagle
  • Emmett
  • Garden City
  • Kuna
  • Meridian
  • Nampa
  • Payette
  • Star
  • Surrounding Treasure Valley communities

What HVAC brands does Greens Heating install and service?

Greens Heating & Air Conditioning services all major HVAC brands. For new installations, the company works with Carrier and Lennox — two of the industry's leading manufacturers — to provide equipment that fits each home's specific needs and budget.

Does Greens Heating offer financing?

Yes. Financing is available through Service Finance, and an online calculator is available on the financing page of the Greens Heating & Air Conditioning website. Manufacturer rebates are also applied to qualifying installations whenever they are available.

Air Conditioning

How do I know if my AC needs repair?

Any of the following are signs your system needs a professional evaluation:

  • Your thermostat is set to cooling, but the temperature won't reach the set point
  • Little or no air is coming from your vents
  • Your outdoor unit isn't running at all
  • Your system runs constantly without cooling the home effectively

The sooner these issues are addressed, the less likely they are to become major repairs.

Why is my air conditioner running but not cooling my house?

Start by checking these three things before calling for service:

  • Is your indoor air filter clean and unrestricted?
  • Is your outdoor unit clear of debris, overgrowth, or obstructions?
  • Is your furnace blower motor running and pushing air through the vents?

If all three check out and your home still isn't cooling, the issue requires a professional diagnosis. Greens Heating & Air Conditioning offers same-day service throughout the Treasure Valley.

How long should an air conditioner last in Idaho?

An air conditioner that receives routine maintenance per the manufacturer's specifications will typically last 10 to 15 years. Systems that go years without service tend to fail earlier and cost more to repair as they age.

Why is my air conditioner freezing up?

Frozen coils are almost always caused by one of these issues:

  • A dirty or clogged air filter restricting airflow
  • A blower motor that isn't functioning properly
  • Supply or return vents that are blocked, covered, or closed
  • Low refrigerant levels

If you notice ice buildup, turn the system off and call for service. Running a frozen system causes additional damage that increases repair costs.

Is it better to repair or replace my air conditioner?

Every situation is different, but a helpful starting point is to consider two factors together — the age of the system and how well it has been maintained. If your unit is under 8 years old and has received regular annual maintenance, a repair is almost always the better investment. As systems age past that point and repairs become more frequent, replacement starts to make more financial sense. Greens Heating & Air Conditioning will walk you through both options honestly so you can decide what's right for your home and budget.

What size air conditioner do I need for my home in Idaho?

A general sizing guideline for Idaho homes is:

  • Homes built before 2000: approximately 600 square feet per ton
  • Homes built after 2000: approximately 700 square feet per ton

These formulas get you close, but the most accurate way to size a system is a proper load calculation — because every home's insulation, window placement, and layout affect the result differently. Greens Heating & Air Conditioning performs load calculations to ensure your new system is sized correctly, not just approximately.

How much does AC installation cost in the Treasure Valley?

AC installation in the Treasure Valley typically ranges from $8,000 to $15,000. The final cost depends on several factors:

  • The efficiency rating of the equipment selected
  • The brand and model
  • The size of your home
  • Any modifications needed to existing ductwork or infrastructure

Greens Heating & Air Conditioning provides transparent, itemized estimates before any work begins, so there are no surprises.

Heating & Furnaces

Why is my furnace blowing cold air?

Before calling for service, work through this quick checklist:

  • Is your air filter clean?
  • Can you see an orange glow from the igniter?
  • Do you see flames across the burner that stay lit?
  • Does the blower motor come on after ignition?

If the answer to all of those is yes and your furnace is still blowing cold air, something deeper is going on that needs a professional diagnosis. Call Greens Heating & Air Conditioning and we'll get it sorted.

How do I know if my furnace needs repair?

Watch for these signs that your furnace needs professional attention:

  • Your thermostat is not maintaining the heat set point
  • The furnace is running but the home isn't warming up
  • The furnace is cycling on and off erratically
  • Your system is flashing a diagnostic error code

A diagnostic error code in particular is your furnace telling you exactly that something is wrong — don't ignore it.

How long does a furnace last before it needs to be replaced?

A furnace that is serviced regularly per manufacturer specifications will typically last 15 to 20 years. Skipping annual maintenance accelerates wear on internal components and shortens their lifespan considerably.

Do heat pumps work in Idaho winters?

Yes — modern high-efficiency heat pumps are built for cold climates and perform well through Treasure Valley winters. Every heat pump has a balance point temperature, and higher-efficiency units are rated to heat at full capacity even at 0°F outdoor temperatures. Greens Heating & Air Conditioning installs heat pumps designed specifically for Idaho's climate and can help determine which system fits your home.

Why is there frost on my heat pump?

A light layer of frost on your outdoor unit in winter is completely normal. Heat pumps pull heat from outside air across the outdoor coil, which causes frost to build up periodically. The system will automatically enter defrost mode to clear it.

What to watch for instead:

  • Ice buildup of ½ inch to 1 inch that never defrosts — this needs professional attention
  • Frost appearing in summer — check your air filter, confirm all vents are open, and clear the outdoor coil of debris (cottonwood is a common culprit along Idaho rivers)

If either of those situations applies, call Greens Heating & Air Conditioning for a diagnosis.

Why is my furnace making a banging or rattling noise?

The most common causes of furnace noises are:

  • A damaged blower wheel
  • Worn or failing motor bearings
  • Ductwork that wasn't properly secured during installation

Some noises are minor, but worn bearings and blower wheel damage can lead to full component failure if left unaddressed. If the sound is new or getting worse, it's worth having it looked at before it becomes an emergency repair.

What is the most efficient heating system for Idaho winters?

The most efficient setup for an Idaho home is a dual-fuel system combining a 98% efficiency gas furnace with a heat pump rated at 20 SEER or higher — or 12 HSPF (Heating Season Performance Factor). This combination maximizes efficiency across both extreme cold and mild winter days by using whichever heat source is most cost-effective at any given outdoor temperature.

Are there rebates or tax credits for a new furnace in Idaho?

Yes — both manufacturer rebates and federal tax credit programs are available, though the specific amounts and qualifying equipment change throughout the year. Manufacturer rebates typically apply to higher-efficiency systems. Federal programs are updated annually. Greens Heating & Air Conditioning stays current on available rebates and will let you know what applies to your installation at the time of your estimate.

Maintenance

How often should I have my HVAC system serviced?

At a minimum, your system should be serviced once a year. Greens Heating & Air Conditioning recommends twice a year — a spring visit focused on your air conditioner before cooling season, and a fall visit focused on your furnace before heating season. Two visits mean both systems get a detailed inspection before the season that demands the most from them.

How often should I change my air filter?

Filter replacement frequency depends on the filter size:

  • 1-inch filter: every 30 days
  • 2-inch filter: every 60 days
  • 4-inch filter: every 90 days
  • 5-inch filter: every 120 days

These are general guidelines — homes under active construction or renovation may need more frequent changes regardless of filter size.

Does regular HVAC maintenance actually save money?

Yes. Routine maintenance keeps all moving parts clean and operating close to factory specifications, which directly reduces energy consumption. It also allows trained technicians to catch small issues before they become costly component failures. In most cases, the cost of a tune-up is recovered through energy savings and avoided repairs within the same season.

Will a smart thermostat lower my energy bills?

It depends on what you're replacing. If you're upgrading from an older analog or mercury bulb thermostat, the difference can be significant — older thermostats can drift 5 to 7 degrees from the set point, while a smart thermostat holds within 1 degree. That precision alone reduces how hard your system has to work. Smart thermostats also offer scheduling features that let homeowners set heating and cooling patterns once and let the system manage itself from there.

Why does airflow matter for my HVAC system?

Proper airflow is built into your system's design from the start. When airflow is restricted — by a dirty filter, blocked vents, or ductwork issues — the system has to work harder to move the same amount of conditioned air. Over time, that added stress accelerates wear on internal components and can lead to breakdowns or major part failures that could have been avoided.

Scheduling & Service

How fast can I get a technician out to my home in the Treasure Valley?

Greens Heating & Air Conditioning offers same-day emergency service throughout the Treasure Valley. Maintenance plan members receive priority scheduling for all service appointments, including non-emergency visits.

Does Greens Heating offer free estimates?

Yes — Greens Heating & Air Conditioning offers free estimates and free second opinions. If you've received a quote elsewhere and want a straight answer on whether it's fair, we're happy to take a look.

What should I do to prepare before a technician arrives?

Two simple things make the visit go faster:

  • Secure any pets so the technician has safe, easy access throughout the home
  • Make sure the equipment, thermostat, and any problem areas are accessible and clear

If you've noticed specific symptoms — unusual noises, error codes, or smells — make a note of them to share when the technician arrives.

How long does an HVAC service appointment take?

Most service appointments take approximately 90 minutes per system. Larger projects, such as full system replacements, will take longer, and Greens Heating & Air Conditioning will give you a clear time estimate before work begins.

What can I expect during my service appointment?

Greens Heating & Air Conditioning technicians document the visit thoroughly, so you always know exactly what was found and what was done:

  • Photos of the system and any issues identified
  • A clear debrief of findings in plain language
  • Written documentation of work performed
  • Open communication throughout — no surprises

Still Have Questions?

Every home is different, and not every situation fits neatly into a list of answers. If you didn't find what you were looking for, or you're unsure whether your system needs a repair, a tune-up, or a full replacement, the best next step is a conversation with someone who can actually look at your equipment and give you an honest answer.

Greens Heating & Air Conditioning has been serving Treasure Valley homeowners and businesses since 1990 — not by selling people what's most expensive, but by helping our neighbors make informed decisions about their homes. If you have a question, we're happy to talk it through before you commit to anything.

Call us at (208) 465-0859 or contact us to schedule a service call, request an estimate, or just ask a question. We'd rather you call with a question than wait until a small problem turns into a big one.