AC Installation Gone Wrong: Avoid These Common Mistakes

As a result of the uncomfortable summers in New Port, Florida, various locals use air conditioners to stay calm and relaxed. If you think of installing it independently, you’d have to be careful, as AC installation mistakes are relatively common. It is perfect to have a well-grounded system that performs appropriately without using much energy. However, installing and replacing air conditioning would be necessary for several conditions. If you are wondering what such mistakes are, this article is for you. Here are the ten typical air conditioning installation mistakes and how to correct them.

  • Selection of the wrong air conditioning size
  • Establishing a flawed drainage system
  • Installation of Thermostat in the wrong area
  • Improper duct sealing
  • Placing your condenser in the incorrect area
  • Selecting the inappropriate spot for your vent
  • Putting too much refrigerant
  • Not providing the condenser with enough clearance
  • Not getting rid of the drip pan for vertical installations
  • Obstructed return vent

Selection of The Wrong Air Conditioner Size

Selecting the incorrect size air conditioner for installation in a home is among the most common errors individuals make. The effect of earning the wrong size decision can be rather severe, resulting in AC malfunction and problems with energy efficiency.

Installing an air conditioner that is too big for your house can cause short cycles, while installing one that is too small would cause overwork. In both scenarios, the AC will experience an unneeded downturn, leading to an early demise. To summarize, you must choose the proper size.

Establishing a Flawed Drainage System

During its functioning, an air conditioner generates a sizable amount of moisture. This wetness can harm everything nearby if it isn’t adequately filtered out. It involves your home, resulting in aging drywall, clogged pipes, mold development, and musty odors. One of the most frequent air conditioner blunders is, regrettably, using a flawed drainage system. Many homes are suffering from this type of water damage as a result.

Installation of Thermostat in The Wrong Place

If you’re like most people, you’re oblivious that the placement of your thermostat affects how well your HVAC system works. However, you may be confident that it does.

Unfortunately, one of the most recurring errors in air conditioner installation is incorrectly situating the thermostat. Many ACs accordingly end up working harder than they otherwise would. Where should your thermostat be installed, exactly? It should ideally be located distant from air vents and in a shaded area with little exposure to the sun. Its accuracy and the efficiency with which your AC operates will increase the more accurately you can control its temperature.

Improper Duct Sealing

Improper ductwork sealing is another AC installation mistake to watch out for. By allowing forced air to run through the ducts while doing so, you can significantly reduce the efficiency of your AC.

Your ductwork shouldn’t have any cracks at all. Any damage must be sealed with a long-lasting sealant (not tape, which is only a temporary solution). Call your neighborhood HVAC firm for help if you need to seal up your ducting. They’ll make sure that all of your ducts are securely clasped.

Selecting The Inappropriate Spot for Your Vent

The condenser in your air conditioner is essential to its overall performance. Your AC will operate more effectively the less effort it has to make. This will facilitate not just the most significant possible energy savings but also the longest possible AC lifespan. How can the stress on your AC condenser be lessened? Certainly maintenance. But in addition to upkeep, you must also position the condenser correctly. How can you reduce the strain on your AC condenser? Certainly upkeep. But in addition to maintenance, you also need to put the condenser in the right place.

Putting Too Much Refrigerant

Your air conditioning unit is set up. The only thing left to do is add a small quantity of refrigerant. Oh no, you overfilled your system, and now it’s broken. Don’t allow this to happen to you! The instructions must be strictly followed when adding refrigerant. It can cost you a lot of money and destroy your air conditioning system if you add too much refrigerant. You’re advised to only choose a qualified HVAC specialist to be safe. Professionals are skilled in these procedures and will ensure your system is configured correctly.

Not Providing The Condenser With Enough Space

An air conditioner’s condenser needs at least 2 feet of clearance on each side to operate at peak efficiency. If it doesn’t, it will have a difficult time breathing in and have to work considerably more than it usually would. Energy use will go up, and there will be unnecessary wear and tear.

As a result, you must consider its surroundings while putting on your AC condenser. You must relocate it if you intend to use it at any point to store other goods.

Not Getting Rid Of The Drip Pan For Vertical Installation

A common element in many types of air conditioners is the drip pan. Many people assume that getting rid of the drip pan for a vertical installation is necessary; however, this isn’t always true! The drip pan actually serves as a safety measure during intervals when water might collect from condensation or heavy rains. Not installing one could lead to potential problems like spillage and damage to neighboring walls or grounds.

The good news is that there are plenty of options that allow homeowners to keep their drip pans in place even with vertical air conditioner installations!

Most A/C technicians don’t do it because it would involve an additional step in the installation process for air conditioners. When this pan is left in the appliance, airflow can be reduced by up to 2%, which reduces system efficiency by roughly 1%.


In conclusion, AC installation is a complicated job that requires skill and experience. Homeowners seeking to install their own AC units should avoid the common mistakes outlined in this article. Working with a professional is your best bet for assured quality and longevity. Taking the time to research and understand what type of system works best for your budget and climate conditions can help you avoid costly mistakes. If you are still unsure if DIY AC installation suits you, consult a professional for advice.