Question 1

Why is my AC running but not cooling?

Accepted Answer

An AC that runs but won't cool is usually low refrigerant, a dirty evaporator coil, a frozen coil, a failing capacitor, or a clogged air filter. In Lubbock's summer heat, this is a same-day AC repair emergency — Armstrong's certified HVAC techs will diagnose and fix it fast. Call Now.

Question 2

Why is my house hot even though the AC is on?

Accepted Answer

Common causes include undersized equipment, refrigerant loss, blocked airflow, leaky ductwork, a failing compressor, or a thermostat issue. An Armstrong HVAC technician in Lubbock can pinpoint the cause with a full system diagnosis and recommend the most cost-effective fix.

Question 3

Why is my AC blowing warm air?

Accepted Answer

AC blowing warm air is usually low refrigerant, a frozen evaporator coil, a tripped breaker on the outdoor unit, a failing compressor, or the thermostat accidentally set to 'heat' or 'fan only.' Don't keep running it — call an Armstrong Lubbock HVAC tech before damage spreads.

Question 4

Why does my AC keep turning on and off (short cycling)?

Accepted Answer

Short cycling is often an oversized unit, a dirty filter, a failing capacitor, low refrigerant, or a faulty thermostat. It wastes electricity and shortens your AC's lifespan. Armstrong's Lubbock HVAC repair team diagnoses short cycling same-day so the system stops burning itself out.

Question 5

Why is my AC leaking water?

Accepted Answer

Water around the indoor unit is almost always a clogged condensate drain line, a cracked drain pan, a frozen coil that's thawing, or a disconnected line. Left alone it causes ceiling and floor damage — Armstrong's HVAC plumbers in Lubbock clear drain lines and repair drain pans fast.

Question 6

Why is my outside AC unit not turning on?

Accepted Answer

A dead outdoor condenser is commonly a tripped breaker, a blown fuse, a failed capacitor or contactor, low refrigerant triggering a safety shutoff, or a bad thermostat signal. Armstrong's Lubbock HVAC technicians repair outdoor AC units same-day, 24/7.

Question 7

Why is my AC making a loud noise?

Accepted Answer

Banging, screeching, buzzing, or rattling from your AC are all warning signs — loose parts, failing motor bearings, a bad compressor, a refrigerant leak, or electrical issues. Shut it off and call Armstrong's Lubbock HVAC repair team before a small issue becomes a full replacement.

Question 8

Should I repair or replace my AC unit?

Accepted Answer

Repair makes sense for a newer system (under 10 years) with a single failed part. Replace if it's 10–15+ years old, uses R-22 refrigerant, breaks down repeatedly, or the repair quote is more than half the cost of a new unit. Armstrong gives you an honest side-by-side quote so you can choose.

Question 9

How much does a new HVAC system cost in Lubbock?

Accepted Answer

HVAC replacement cost in Lubbock depends on system size (tons), efficiency (SEER rating), brand, and whether ductwork needs work. Armstrong installs Lennox, Mitsubishi, and Daikin systems with upfront flat-rate pricing and flexible financing — Call Now for a free in-home HVAC replacement estimate.

Question 10

How much does it cost to replace an AC unit?

Accepted Answer

AC installation cost in Lubbock varies by tonnage, efficiency, and whether your existing furnace and ductwork can stay. Armstrong quotes the complete installation upfront — equipment, labor, permits, haul-away — so you know the total before saying yes.

Question 11

How much does an HVAC diagnostic visit cost?

Accepted Answer

Armstrong's HVAC diagnostic in Lubbock is a flat-rate service call, and the fee is waived when you approve the repair on the same visit. You can also get an Instant Quote online — no surprises.

Question 12

Does Armstrong offer financing for HVAC replacement?

Accepted Answer

Yes. Armstrong offers flexible HVAC financing in Lubbock with easy monthly payments, so a new high-efficiency system doesn't have to wait. Ask your technician or visit our Financing page for current plans and qualified-buyer offers.

Question 13

Is it cheaper to repair or replace my AC?

Accepted Answer

If your AC is under 10 years old and the repair is a single part, repair almost always wins. Past 10–12 years — especially with rising energy bills and repeat breakdowns — a new high-efficiency AC pays you back in lower summer electric bills. Armstrong's Lubbock HVAC techs quote both so you can compare.

Question 14

How do I know if I need a new AC unit?

Accepted Answer

Signs you need AC replacement: it's 10–15+ years old, uses R-22 refrigerant, your electric bill keeps climbing, it can't keep up on hot Lubbock days, it needs frequent repairs, or rooms feel uneven. Armstrong's Lubbock HVAC team will tell you straight whether replacement makes sense.

Question 15

How long does an HVAC system last in Texas?

Accepted Answer

In West Texas, a well-maintained AC typically lasts 12–15 years and a furnace 15–20 years. Lubbock's heat, dust, and hard water shorten that lifespan when systems aren't maintained — which is why Armstrong's ASAP Maintenance Plan is the cheapest way to extend equipment life.

Question 16

What size AC unit do I need for my home?

Accepted Answer

AC sizing depends on square footage, ceiling height, insulation, window count, sun exposure, and ductwork — not just a quick square-foot estimate. An undersized AC runs constantly; an oversized one short-cycles and wastes money. Armstrong's Lubbock HVAC installers do a proper Manual J load calculation on every install.

Question 17

What is the best HVAC system for West Texas heat?

Accepted Answer

For Lubbock and West Texas, a high-SEER Lennox central system or a heat pump paired with proper ductwork is hard to beat. For additions, garages, or hot back rooms, Mitsubishi and Daikin ductless mini-splits handle extreme heat efficiently. Armstrong installs all three.

Question 18

Are high-efficiency AC units worth it?

Accepted Answer

In Lubbock's long cooling season, yes — a high-SEER system can meaningfully cut summer electric bills versus an older 10-SEER unit, and many qualify for utility rebates or tax credits. Armstrong's HVAC team will run the payback math so you can decide.

Question 19

Do I need to replace my furnace and AC at the same time?

Accepted Answer

Not always — but if both are 10+ years old, replacing as a matched system is usually cheaper than two separate jobs, runs more efficiently, and keeps your warranty cleanly under one manufacturer. Armstrong will quote both ways so you can choose.

Question 20

How often should I service my AC?

Accepted Answer

At least once a year in spring, before Lubbock's summer heat — twice a year (spring AC, fall furnace) is ideal. Armstrong's ASAP Maintenance Plan bundles both tune-ups plus priority service and repair discounts.

Question 21

When should I schedule HVAC maintenance?

Accepted Answer

Spring (March–May) for AC tune-ups and fall (September–November) for heating tune-ups. Booking ahead of peak season means a Lubbock HVAC tech is at your home before the equipment is under stress — and before everyone else's system breaks down and the schedule fills up.

Question 22

Is an AC tune-up worth it?

Accepted Answer

Yes. A proper AC tune-up catches small issues before they become $1,000+ emergency repairs, keeps your manufacturer warranty valid, restores efficiency you've quietly lost over the year, and typically pays for itself in one summer of lower electric bills.

Question 23

How do I lower my summer electric bill in Lubbock?

Accepted Answer

Change your filter every 1–2 months, schedule an AC tune-up, set the thermostat at 76–78°F when you're home, use ceiling fans, seal duct leaks, and consider a smart thermostat. If your bill keeps climbing despite all that, the system itself is losing efficiency — Armstrong can diagnose and fix it.

Question 24

Why is my AC bill so high?

Accepted Answer

Rising AC bills usually mean a dirty filter, low refrigerant, leaky ducts, a failing capacitor or compressor, or an aging system that's lost efficiency. An Armstrong HVAC efficiency check in Lubbock pinpoints exactly where money is leaking out of your system.

Question 25

What happens if I skip HVAC maintenance?

Accepted Answer

Skipped maintenance leads to higher electric bills, shorter equipment lifespan, more emergency breakdowns, voided manufacturer warranties, and worse indoor air quality. In Lubbock's climate it usually shows up as a system failure on the hottest day of the year.

Question 26

Who does furnace repair near me in Lubbock?

Accepted Answer

Armstrong has been Lubbock's trusted furnace repair company since 1934. Our licensed HVAC technicians repair all brands of furnaces and heat pumps — gas, electric, and high-efficiency — with 24/7 emergency service for freezing winter nights.

Question 27

Why is my heater blowing cold air?

Accepted Answer

Cold air from your heater can mean the pilot light or igniter has failed, the furnace is overheating and shutting off the burners, the thermostat is set to 'fan,' the flame sensor is dirty, or there's a gas supply issue. Armstrong's Lubbock furnace repair team diagnoses same-day.

Question 28

Why won't my furnace turn on?

Accepted Answer

A furnace that won't start is often a tripped breaker, a thermostat issue, a closed gas valve, a dirty flame sensor, a failed igniter, or a safety switch that's tripped. Don't keep resetting it — call an Armstrong HVAC tech to find and fix the real cause safely.

Question 29

How often should I service my heater?

Accepted Answer

Annually, every fall before heating season — and twice a year if it's a heat pump (since it runs year-round). Furnace maintenance is also a safety check: technicians test for cracked heat exchangers and unsafe combustion, which can leak carbon monoxide.

Question 30

Is my furnace safe to use?

Accepted Answer

Warning signs of an unsafe furnace include a yellow (instead of blue) flame, soot around the unit, unusual smells, frequent headaches or nausea in the house, or a CO alarm. Turn it off and call Armstrong for an emergency furnace safety inspection in Lubbock.

Question 31

Should I repair or replace my furnace?

Accepted Answer

Repair is usually best for newer furnaces with one failed part. Replace if it's 15–20+ years old, has a cracked heat exchanger (safety risk), needs frequent repairs, or runs noticeably louder and less efficient than it used to. Armstrong's Lubbock HVAC team quotes both options honestly.

Question 32

Why is my house so dusty?

Accepted Answer

Excessive dust usually means leaky return ducts pulling in attic or crawlspace air, an inadequate or dirty air filter, or no whole-home air purification. In Lubbock — where wind and dust are constant — proper duct sealing and a high-MERV filter or media air cleaner make a dramatic difference.

Question 33

Does duct cleaning help allergies?

Accepted Answer

Duct cleaning helps when ducts are visibly dirty, after construction or remodeling, or if there's been pest activity. For most ongoing allergy relief, a quality air filter, a whole-home media filter, and UV or air purification deliver more day-to-day improvement. An Armstrong Lubbock HVAC tech will recommend what your home actually needs.

Question 34

Why does one room stay hotter than the others?

Accepted Answer

Hot rooms are typically caused by undersized or leaky ductwork, a closed/blocked register, poor insulation, sun exposure, or an unbalanced HVAC system. Armstrong's Lubbock HVAC team can balance airflow, repair ducts, or add a ductless mini-split to bring the room back into comfort.

Question 35

Can HVAC help with allergies?

Accepted Answer

Absolutely. Upgrading your air filter, adding a whole-home media filter, installing UV germicidal lights, sealing leaky ducts, and managing humidity all dramatically reduce allergens. Armstrong installs full indoor air quality systems for Lubbock homes.

Question 36

Should I get my air ducts cleaned?

Accepted Answer

Get ducts cleaned if you see visible dust/debris around vents, after renovation work, after pest issues, or if no one has ever inspected them in 10+ years. Otherwise focus on sealing leaks, upgrading filtration, and regular HVAC maintenance — Armstrong's Lubbock techs will tell you straight whether cleaning is worth it for your home.

Question 37

What is the best air filter for my AC?

Accepted Answer

For most Lubbock homes a MERV 8–11 pleated filter strikes the right balance between filtration and airflow. High-MERV filters (13+) are great for allergies but only if your system can handle the airflow restriction. Armstrong's HVAC techs recommend the right filter for your specific equipment.

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