Heating & air questions for Joplin and the four-state area.

Repair usually makes sense when the system is under about 10 to 12 years old and the fix is a normal wear part. Replacement makes more sense when it is older, the repair is a major part such as the compressor or coil, or it uses R-22 refrigerant.

A common rule of thumb: multiply the age of the unit by the repair cost. If the number is above roughly $5,000, replacement is worth pricing. It is a starting point, not a verdict; an honest contractor will tell you when a repair is still the smart move.

Central air conditioners and heat pumps commonly last around 12 to 15 years here, and gas furnaces often 15 to 20 or more, depending on maintenance and how hard they work.

Heat pumps run year-round, so they tend toward the shorter end. Long, humid summers in the four-state area put real hours on cooling equipment.

Usually, yes. The outdoor condenser and indoor coil are designed as a matched pair, and new systems use different refrigerants than older ones.

Mismatched equipment can lose efficiency, void manufacturer warranties and fail early. If your furnace is old too, it is worth discussing whether to replace it at the same time.

Not just because of its age. If it cools the house, the bills are reasonable and it passes a maintenance check, you can keep running it.

What changes the math: a major failure, an R-22 system that needs refrigerant, or rising repair bills. Planning ahead lets you replace it on your schedule instead of during a heat wave.

Because the right size depends on the house, not the square footage alone. A load calculation (Manual J) accounts for insulation, windows, air leaks, orientation and ceiling heights.

An oversized air conditioner short-cycles and leaves a humid house; an undersized one runs nonstop on the hottest days. Matching the old unit’s size can repeat an old mistake.

It depends on your plan. Home warranties often cover the repair of covered parts after a service fee, with limits and exclusions spelled out in the contract.

Heat and Air by Tim works with home warranty companies. Start the claim with your warranty company, and ask whether they can send Heat and Air by Tim.

Yes. The four-state area has relatively mild winters, and a modern heat pump heats efficiently through most of the season, with backup heat for the coldest nights.

Cold-climate models keep producing useful heat well below freezing. On a heat pump with electric backup, a working backup heat strip is what carries you through a hard cold snap, so it should be checked every fall.

Heat pump air feels cooler than furnace air even when it is working: often around 90 to 100°F at the vent, compared with 120°F or more from a gas furnace.

If the house is not keeping up, it may be in a defrost cycle (normal, and short), low on refrigerant, or the backup heat may not be coming on. If it continues, call for service.

A light frost in cold, damp weather is normal, and the unit should clear it with a defrost cycle every so often.

A thick block of ice that does not clear, or ice on the top and coil for hours, points to a defrost, airflow or refrigerant problem. Turn the system to emergency heat if you have it, and call for service. Don’t chip at the ice.

Both work well in the four-state area. Gas furnaces deliver hotter air and handle deep cold easily; heat pumps are efficient for most of the winter and also provide air conditioning.

Many homes with gas or propane choose a dual-fuel system: a heat pump for most of the year and the furnace for the coldest days. The best choice depends on your fuel prices, your house and what is already installed.

A furnace that lights and then shuts off is very often a dirty or failing flame sensor, a safety device that shuts the gas off when it cannot confirm a flame.

Other causes include a clogged filter, venting problems or a failing pressure switch. Because these are gas-burner safety parts, have a technician diagnose it.

Emergency heat (EM heat) runs only your backup heat, usually electric strips, without the heat pump.

Use it when the heat pump has failed or is iced up and you are waiting for service. It is far more expensive to run, so it is not meant for everyday use.

Once a year for each system: the air conditioner in spring and the furnace in fall. Heat pumps run year-round, so twice a year is the usual advice.

Preventive maintenance catches weak capacitors, dirty coils, clogged drains and gas-burner safety problems before they become a breakdown on the hottest or coldest day.

A good visit checks the electrical parts and connections, measures how the system is running, cleans what needs cleaning and looks for safety problems.

For cooling, that includes the outdoor coil, capacitor, contactor and condensate drain. For a gas furnace, it includes the burners, flame sensor, ignition, venting and the heat exchanger area, plus the blower and filter.

Check it every month and change it when it looks dirty. For a standard 1-inch filter, that is often every one to three months; thicker media filters can last longer.

Change more often during heavy-use months, with pets, or during construction or dusty seasons. A clogged filter is one of the most common causes of frozen coils and overheating furnaces.

Not always. Higher-MERV filters catch smaller particles, but a dense filter in a system not built for it can restrict airflow.

MERV 8 to 11 suits most homes. If you want higher filtration, ask whether your system can handle it or whether a thicker media cabinet is a better fit.

Change the filter, keep 2 feet of clearance around the outdoor unit, rinse loose debris off the outside of the coil with a garden hose (power off), keep supply and return vents open and unblocked, and replace thermostat batteries.

Leave refrigerant, gas lines, burners and high-voltage electrical parts to a technician. Those are not DIY jobs.

Turn the system off at the thermostat and call for service. The most common cause is a clogged condensate drain line; others are a cracked drain pan or a frozen coil melting.

If the unit is in an attic, act quickly: overflowing water can damage ceilings. Many systems have a float switch that shuts the AC off for exactly this reason.

The air conditioner is cooling but not removing enough moisture. The usual causes are an oversized unit that shuts off too quickly, a fan set to ON instead of AUTO, or too much airflow.

In humid southwest Missouri summers this is a common complaint. Right-sizing, fan settings and airflow adjustments fix most cases; some homes benefit from a dehumidifier.

Around 40 to 50 percent relative humidity in summer is comfortable and discourages mold and dust mites.

In winter, lower is fine; indoor humidity that is too high in cold weather causes condensation on windows. An inexpensive hygrometer shows you where you are.

Usually it is the ductwork serving that room: a long run, a small duct, leaks, a crushed or disconnected line, or no return air path.

Ductwork repairs, added runs, returns and balancing fix most problem rooms without replacing the whole system.

Often, yes. Heat and Air by Tim adds ductwork to homes, including additions, finished basements and older houses built without forced air.

The plan depends on where ducts can run (attic, crawlspace, basement or chases) and on the system that will feed them.

A lot. The U.S. Department of Energy estimates that a typical duct system loses 20 to 30 percent of the air moving through it to leaks, holes and poor connections.

Ducts in hot attics and crawlspaces lose the most. Sealing and insulating them is one of the best comfort and efficiency upgrades.

For many homes, yes: scheduling and remote control make it easier to avoid heating and cooling an empty house.

The thermostat has to match the system. Heat pumps, dual-fuel and multi-stage systems need a thermostat wired and configured for them, or they can run backup heat unnecessarily.

R-22 (Freon) has not been produced or imported in the U.S. since 2020, so it is available only from recycled and stockpiled supplies, which makes refrigerant repairs expensive.

You can keep using a working R-22 system. But if it develops a major leak or a compressor failure, replacement is usually the better investment.

Under the EPA’s AIM Act rules, new residential air conditioners and heat pumps have moved from R-410A to lower-global-warming refrigerants such as R-454B and R-32, classified as A2L (mildly flammable).

These systems are designed and installed to specific safety standards, and they need technicians trained to handle them. Existing R-410A systems can still be serviced.

SEER2 measures cooling efficiency, HSPF2 measures heat pump heating efficiency, and AFUE measures the percentage of fuel a furnace turns into heat. Higher is more efficient for all three.

The “2” versions came in with the 2023 federal test procedures, so their numbers run a little lower than old SEER and HSPF ratings for the same equipment.

Missouri and Kansas are in the Department of Energy’s North region, where the minimum for a new split-system central air conditioner is 13.4 SEER2. Oklahoma and Arkansas are in the Southeast region, where the minimum is 14.3 SEER2 for most home-size units.

Heat pumps have one national minimum: 14.3 SEER2 and 7.5 HSPF2 for split systems.

Sometimes. The savings depend on how many hours your system runs, your electric rate, and what you are replacing.

Going from a 20-year-old unit to any new system is a big jump. Going from a minimum-efficiency model to the top tier saves less per dollar. Ask for the same house priced at two efficiency levels and compare.

Leave the house right away with everyone in it. Don’t flip light switches, use the phone inside, or start a car in an attached garage.

Once you are outside and away from the house, call your gas utility’s emergency number or 911. After the utility has made it safe, call for repairs.

Get everyone out of the house into fresh air and call 911. Don’t go back in until responders say it is safe.

Afterward, have your furnace, water heater and any other fuel-burning appliances checked before using them again. Every home with gas or propane appliances or an attached garage should have working CO alarms.

Call for service. Meanwhile, check that the thermostat is set to heat, the filter isn’t clogged and the furnace switch and breaker are on.

Keep warm with layers, blankets and closed-off rooms. Never heat the house with an oven, stove, grill or generator: they can produce deadly carbon monoxide. To protect pipes, open cabinet doors under sinks on outside walls.

Missouri does not issue a statewide HVAC contractor license. Licensing and permits are handled locally, so cities such as Joplin set their own requirements for mechanical contractors.

Ask any contractor which local licenses they hold and for proof of insurance. Anyone who handles refrigerant must have EPA Section 608 certification, which is federal.

Kansas, like Missouri, has no statewide HVAC contractor license; it is handled locally. Oklahoma licenses mechanical contractors through the Construction Industries Board (CIB). Arkansas licenses HVACR work through its HVACR Licensing Board, part of the Arkansas Department of Health.

In all four states, refrigerant work requires EPA Section 608 certification.

Look for a contractor who explains what is wrong in plain words, puts the price in writing before work starts, and gives you options instead of a single high-pressure answer.

Check local licensing and insurance, ask how they size new systems (a load calculation, not a guess), ask who will actually do the work, and ask what happens if something isn’t right afterward.

Often, yes, especially inside city limits. Many cities require a mechanical permit and inspection for furnace, air conditioner and heat pump replacements, and gas or electrical work can add requirements.

Rules vary by city and county across the four-state area. Your contractor should know what your address requires.