1. The Temperature of the Air Coming Out of Your Vents Isn't Right. After years of use, your AC unit can have a real hard time keeping the proper temperature. If it has been blowing out air warmer than the setting on your thermostat and making it uncomfortable inside—that's a key sign.
The compressor has failed
Growling, clattering, or screeching noises. AC won't start or takes a very long time to do so. AC stops blowing cold air. Reduced airflow.
If you kept your air conditioner in good condition over its lifetime, expect to need a replacement in about 10-15 years. Keep in mind that as your A/C grows older, its mechanical parts can become unavailable or obsolete over time. If you aren't able to replace a broken part, you will need to purchase new unit.
The $5,000 rule is a rule of thumb in the HVAC industry to help homeowners decide whether HVAC repair or HVAC replacement makes more sense in the long run. The $5,000 rule: Multiply the age of your equipment by the estimated repair cost. If the number is more than $5,000, then you should consider replacing your unit.
It's important to be aware of how long air conditioners last, so you don't get the unwelcome surprise of a broken air conditioner in the peak of the summer heat. In general, air conditioners that are properly maintained can last 15 to 20 years.
Usually, it is a quick fix, but sometimes the failure can be caused by a much bigger problem. The most expensive part of an AC unit to replace and repair is the air compressor.
Newer systems can regulate the temperature in your home more precisely than older models. A new air conditioner will use less energy to lower the temperature and when paired with effective insulation, will keep your home cooler for longer.
The first thing you'll want to do is check the thermostat. If you have air that's controlled by a thermostat, make sure a faulty thermostat isn't what's causing the problem. In some cases, the batteries may have died or the unit is malfunctioning. Reset the thermostat to see if that turns the AC unit back on.
On average, AC compressor costs range from $800 to $2,300, with most folks paying $1,200 for a new one. However, your price will vary depending on factors like the size and brand of your compressor. Before you schedule your replacement, read on to learn about all AC compressor cost factors.
A typical air conditioner installation can take anywhere from 4 to 8 hours to complete. In some instances, this can take longer depending on the scope of the project.
The refrigerant that new AC units use works better and are less likely to damage our atmosphere. On top of this major change, modern AC units are generally built to be more energy efficient than their older counterparts. This saves you money on energy bills and keeps CO2 out of the air.
Get a thermometer and measure the supply air temperature coming out of the grill and the return air temperature at the filter, it should be 18–22 degrees different if not a problem, then measure the temperature of the air entering the unit outside and the temperature leaving, the hotter air, 15–25 degree difference, if ...
Average New AC Unit Costs
The average cost of installing a new central air conditioner in 2024, including equipment and labor costs, is $5,750 for a 3-ton unit in a 2,000-square-foot home. On average, a new AC unit cost will fall between $3,300 and $7,800.
Ductless units are considered the most energy-efficient air conditioning systems on the market. They also can be installed in just about any home because they do not require expensive ductwork. For older homes — and those where it isn't feasible to install ductwork — ductless systems are considered the ideal choice.
A standard homeowners insurance policy provides coverage for heating, ventilation and air conditioning (HVAC) systems if they're damaged by a fire, for example. But if your AC unit stops working due to an accident or normal wear and tear, your insurance company probably won't pay your claim.
Better pricing: Since there's less demand for HVAC system replacement in spring and fall, your HVAC contractor might even offer their own savings incentives.
Many HVAC technicians use the "5,000 rule" when making this decision. Simply multiply the age of the system by the repair cost. If it's under $5,000, consider a repair; if it's over $5,000, it's probably better off buying a new unit.
Central Air Conditioning/AC
A central AC system includes a condenser, a compressor, and an evaporator. Costs for both the system and the labor to install it range from $6,465 to $11,877.
How much value does a new HVAC unit add to your home? A new HVAC unit typically adds about $2,500 to $3,000 to the value of your home or about 5% to 7% of your home's value. Since a new unit can cost up to or more than $10,000 to install, it's up to you to decide if the upfront cost is worth the added value.