Common Heat Pump Problems

Heat pumps keep your home comfortable in both summer and winter. When something goes wrong, you may notice that your home isn't heating or cooling properly, the system runs constantly, or the heat pump makes unusual noises.

Some problems are simple, while others require professional diagnosis. Here are some of the most common heat pump problems we see and what you can safely check before calling AirTek Services.

Heat Pump Not Heating or Cooling

If your heat pump is running but your home isn't getting comfortable, there may be a problem with airflow, the thermostat, refrigerant, electrical components, or another part of the system.

You may notice:

• The heat pump is blowing cool air when heating
• The system is blowing warm air when cooling
• Your home has hot or cold spots
• The heat pump runs constantly
• The system turns on and off frequently
• Airflow from the vents feels weak
• The outdoor unit isn't running

Things you can check:

• Make sure the thermostat is set to the correct mode.
• Check the air filter and replace it if it's dirty.
• Make sure your supply and return vents are open.
• Check your electrical panel for a tripped breaker.

If those basic checks don't solve the problem, your heat pump may need professional diagnosis.

Heat Pump Capacitor Problems

The capacitor helps the motors in your heat pump start and operate properly. When a capacitor begins to fail, the system may have trouble starting or may stop working altogether.

Common signs include:

• Humming from the outdoor unit
• The outdoor fan isn't spinning
• The system has trouble starting
• The heat pump shuts off unexpectedly
• The system works intermittently

Capacitors contain stored electrical energy and can be dangerous to handle. Do not attempt to test or replace a capacitor yourself. This is a job for a qualified HVAC technician.

Heat Pump Compressor Problems

The compressor is a major component of your heat pump. It moves refrigerant through the system so your heat pump can transfer heat and keep your home comfortable.

Possible warning signs include:

• Loud or unusual noises
• Grinding or vibrating
• The system isn't heating or cooling properly
• The outdoor unit repeatedly shuts down
• The breaker keeps tripping
• The compressor won't start

Compressor problems can have several causes, including electrical problems, refrigerant issues, restricted airflow, overheating, or normal component wear.

If your heat pump is making unusual noises or repeatedly tripping the breaker, it's best to turn the system off and have it checked.

Heat Pump Humidity Problems

Your heat pump normally removes moisture from your home while cooling. If your house still feels damp or humid, your HVAC system may not be operating properly.

Possible causes include:

• Dirty air filter
• Poor airflow
• Clogged condensate drain
• Refrigerant problems
• Equipment that isn't properly sized
• Other system performance problems

Start by checking the air filter and making sure your vents aren't blocked. If your home remains unusually humid, an HVAC professional can inspect the system and determine what's causing the problem.

Heat Pump Freezing Up

Seeing some frost on an outdoor heat pump during winter can be normal. Your system should periodically enter a defrost cycle to remove that frost.

Heavy or persistent ice buildup, however, can indicate a problem.

Possible causes include:

• Restricted airflow
• Low refrigerant
• A dirty outdoor coil
• Defrost control problems
• Outdoor fan problems
• Other mechanical or electrical issues

If your heat pump is heavily covered in ice:

1. Turn the system off.
2. Check the air filter.
3. Make sure indoor vents and return grilles aren't blocked.
4. Remove leaves and debris from around the outdoor unit.
5. Call an HVAC professional if the ice returns or doesn't clear normally.

Don't use tools to chip ice away from the coil. You could damage the coil or refrigerant tubing.

Heat Pump Thermostat Problems

Your thermostat tells your heat pump when to heat, cool, and shut off. A thermostat problem can make the entire system behave incorrectly.

You may notice:

• The system won't switch between heating and cooling
• The temperature doesn't match the thermostat setting
• The system turns on and off too frequently
• The heat pump doesn't respond to thermostat changes
• Auxiliary heat appears to run more than expected

Try these simple checks:

• Make sure the thermostat is set to the correct mode.
• Check the temperature setting.
• Replace the batteries if your thermostat uses them.
• Make sure the thermostat isn't located in direct sunlight.
• Try changing the temperature setting slightly to see if the system responds.

If the thermostat appears to be working but the heat pump doesn't respond, the problem may be elsewhere in the system.

Heat Pump Airflow Problems

Good airflow is important for your heat pump to work properly. A dirty filter, blocked vent, ductwork problem, or blower issue can reduce airflow and make your system work harder.

Common signs of an airflow problem include:

• Weak airflow from vents
• Uneven temperatures
• Some rooms staying too hot or too cold
• Longer-than-normal run times
• Excessive dust
• Coils freezing

Things you can check:

• Replace a dirty air filter.
• Make sure supply vents are open.
• Move furniture away from vents and return grilles.
• Make sure return-air grilles aren't blocked.
• Keep leaves, grass, and debris away from the outdoor unit.

If airflow remains weak after these basic checks, your system may need a professional inspection.

When Should You Call an HVAC Professional?

Not every heat pump problem requires an emergency service call, but some problems shouldn't be ignored.

Call AirTek Services if you notice:

• Your heat pump isn't heating or cooling
• The system repeatedly trips the breaker
• Loud banging, grinding, or unusual noises
• Burning or electrical odors
• Heavy or recurring ice buildup
• Water around the indoor unit
• Weak airflow that doesn't improve after changing the filter
• Frequent short cycling
• Your system is running constantly without reaching the desired temperature
• Your energy bills suddenly increase without an obvious reason

Refrigerant problems, electrical repairs, compressor problems, and other internal HVAC repairs should be diagnosed and handled by a qualified HVAC professional.

Don't Let a Small Heat Pump Problem Become a Bigger Repair

When a heat pump isn't operating properly, continuing to run it can sometimes put additional strain on other components.

Getting the problem checked can help you avoid:

• More expensive repairs
• Unnecessary wear on the system
• Higher energy use
• Loss of heating or cooling
• Unexpected breakdowns

If you're not sure what's wrong, you don't have to figure it out yourself.

AirTek Services can diagnose the problem, explain what we find, and review your repair options before work begins.

Heat Pump Repair in Upstate South Carolina

AirTek Services provides heat pump repair and maintenance for homeowners in Spartanburg, Greenville, Moore, and surrounding Upstate South Carolina communities.

Our technicians troubleshoot common heat pump problems, including:

• Heat pumps not heating
• Heat pumps not cooling
• Heat pump freezing
• Capacitor problems
• Thermostat problems
• Airflow problems
• Refrigerant issues
• Electrical problems
• Compressor problems
• Defrost system problems

Whether your heat pump isn't keeping up, won't turn on, or is making an unusual noise, we're here to help.

Not sure what's wrong with your heat pump? We'll diagnose the system, explain what we find, and review your repair options before work begins.

Call AirTek Services at (864) 381-9683 to schedule service.