HVAC repairs cost $150 to $450 on average, depending on the problem and whether the system is still under warranty. Common small repairs include replacing the circuit board, thermostat, or capacitor. Larger repairs like replacing the evaporator coil, condenser, furnace blower motor, or air handler can cost $1,000 to $3,000+ if the unit is out of warranty.

Most HVAC companies also charge a $75 to $200 service call fee for a visit to diagnose the problem.

HVAC replacement costs $5,000 to $11,000, including a new furnace and AC unit using the existing ductwork. A new HVAC system with ductwork costs $7,000 to $16,000 installed.

Prices depend on the house size, ductwork length, and the HVAC system size, type, and brand. AC units with a high Seasonal Energy Efficiency Ratio (SEER) rating and high-efficiency furnaces cost 30% to 100% more but reduce your energy costs and may save you more money in the long-term.

Most homeowners insurance policies only cover HVAC repairs if the breakdown was caused by a natural disaster, such as a fire or tornado. Standard policies do not cover repairs for normal wear and tear.

Some insurance companies offer an add-on policy at an extra cost to cover HVAC repairs caused by age or normal use.

HVAC repair technicians typically don't expect a tip, but they appreciate a $10 to $20 tip for outstanding service. Consider offering the technician a beverage, send positive feedback to their manager, and post a positive review online.

HVAC systems last 15 to 25 years on average, depending on the brand and usage. Each component has its own lifespan:

• A furnace lasts 15 to 30 years.
• An AC unit lasts 15 to 20 years.
• A heat pump lasts 10 to 20 years.

Have your HVAC system serviced at least once or twice per year, depending on the climate and the system's age and type. Most experts recommend having the air conditioning components serviced in the spring and the heating components serviced in the fall.

Look for these signs your HVAC system needs repairs or replacing:

• Increase in energy bills
• Weak or limited airflow from the vents
• Uneven home heating or cooling
• AC unit or furnace cycles on and off frequently
• Loud noises from the system
• Abnormal or musty odors from the system
• Debris coming from the vents
• Dust or soot accumulation

Consider replacing instead of repairing your HVAC system if:

• The system is more than 10 years old.
• The repair cost is at least 50% of the price of a new system.
• The repair cost multiplied by the system's age in years exceeds $5,000.

Follow these guidelines to choose the best local HVAC repair pro:

• Get at least three estimates to compare. Confirm the quotes include equipment of the same size and quality.
• Look for a company with certifications from North American Technician Excellence (NATE), the American Society of Heating, Refrigeration, & Air-Conditioning Engineers (ASHRAE), HVAC Excellence, and the National Propane Gas Association (NPGA).
• Choose companies that are insured, bonded, and have been in business for 5+ years.
• Read reviews and check out their previous work on HomeGuide and Google.
• Avoid selecting the lowest quote as it may indicate low-quality equipment or workmanship.
• Get a detailed contract and warranty in writing before the work begins.
• Never pay in full before the project starts. Follow a payment plan instead for work completed.

Ask these questions to ensure you hire the best HVAC repair service:

• How long have you been in business?
• Are you licensed and insured?
• Which certifications do you have?
• Can you provide references with contact information?
• Can my HVAC system be repaired or does it need replacing?
• How long will the job take?
• What extra costs should I expect?
• Are the new parts covered by a manufacturer's warranty?
• Do you warranty the labor?
• Is my thermostat in the best location for the layout of my home?
• Will you inspect my existing ductwork for leaks, mold, and asbestos?
• Do you offer an HVAC maintenance or service plan?