how to repair Air Conditioner A/C

how to repair Air Conditioner A/C

It’s very common and normal for your air condition to develop a technical issue, most times these are issues you can easily fix by yourself even with little or no technical knowledge.  If you don’t know how to open air conditioner, you can follow up the steps below:

How to Open/Dismantle Indoor Air Conditioner A/C

  • Make sure your AC is switched off
  • Open the vent, most of the vents uses clip, so you have to pull carefully
  • Unscrew all the nuts around the air conditioner
  • Untight all the screws connecting the wires mostly like a box at the right hand side
  • You can carefully remove the cover

How to repair Air Conditioner A/C

  • Is your air conditioner blowing hot air?
  • Does one room feel warmer than the other?
  • Is your air conditioner constantly running, but no air seems to be blowing or cooling?

Seven helpful steps to take in Repairing your Indoor Air Condition

Step 1:

Make sure none of your air vents are blocked. Nothing should be obstructing them including drapes and furniture. They can restrict airflow and impact a room’s temperature.

Step 2:

Clear grass, weeds, anything that can cause obstruction and clean your condensing unit with a commercial coil cleaner. It’s recommended that you do not open up the unit. The damage can easily be done to the fans and can drastically shorten the life of your system.

Step 3:

Test your thermostats accuracy with another temperature gauge. If they do not match your thermostat, then i think it’s out of calibration and you will need to get it reset. To do so reference the manufacturer’s instructions.

Step 4:

Check your thermostat setting, make sure it’s set to cool. Replace the batteries on your programmable thermostat. Then set your thermostat 10 degrees colder than the indoor temperature to get a clear gauge if your AC is operating properly. Listen for fans running in both your air handling unit and your condensing unit.

Step 5:

Also check the master switches to both your inside and outside units and make sure both are receiving electricity. Press your air conditioners reset button if it has one. by resetting the unit it can clear some of the minor mechanical issues that may cause the system to act irregularly.

Step 6:

Check the power to your unit. A circuit breaker may be tripped in that case, flip the switch. This should not happen often. If it does, you should consult a licensed HVAC technician.

Step 7:

Go to the air conditioner return vent and change your filter. Dirt restricts airflow can cause problems and impact the temperature of your home. As a rule of thumb, you need to always change your filter monthly.

Note:  When choosing a heating and cooling company. It’s important that you find one that employs licensed and highly trained technician to install your Air Conditioner.

Step by Step guide on how to install Air Conditioner AC

Before you start installing your Air Conditioner, you need to make sure you have all the necessary tools required, you also need to inspect various components of the air conditioner just to make sure there are no missing items or defects before you begin with the installation, you can perform majority of the installation yourself, however at least 10% of the work will require a trained professional.

It’s very important to refer to the owner’s manual, paying high attention to safety precautions and procedures before you start with the installation, proper installation is crucial to getting the job done, ensure you have the right tools for the installation process, standard installation tools are needed, like:

  • Adjustable Wrenches
  • Drill
  • Drill bits
  • Hole Saw
  • Utility Knife
  • Wire Cutter
  • Stripper Phillips
  • Flathead Screwdrivers
  • Level Safety Glasses
  • Workloads
  • Manifold Gauges
  • Vacuum Pump Flaring Tool
  • Dry Nitrogen Tank
  • Regulator

Step 1

  • To begin with your installation, you need to choose a spot on the wall surface where the unit will be secured, you need to make sure the location is free of obstructions near the air conditioner inlet and outlet, it has to be at least 6 feet from the floor, you can also refer to the manual for more tips on choosing a location best suited for the AC.
  • You need to remove the wall bracket from the back of the mini split indoor air handler, make sure you hold the bracket in place, you should use a level to make sure it is horizontally level, then you mark the screw holes with a pencil
  • You then drill the mark tools to create a pilot hole and use appropriate sized self tapping screws with anchors to fix the wall mounting frame
  • Finally you need to check to ensure the wall mounting frame is firmly attached by pulling on it

Step 2

  • You will now then need to create a hole in the wall of which will allow the refrigerant lines control wires and condensation drain tube to go outside, the hole is usually two and half to three inches wide, while carefully digging the hole, make sure the pipes can follow via the hole to angle downwards to the outside for proper condensate drainage, the refrigerant piping should be on the right and the drain tube on the left, although you can configure to your preference
  • You should remove the outer cover of the air handler, the Open the service hatch and remove the four screws across the front and the fifth screw in the Centre bottom
  • Turn the unit over and ensure you release the four locking tabs
  • You should carefully lift off the cover and turn the unit over to expose the drain connection
  • You should On fasten the retaining clip for the drain hose and remove the drain hose
  • Then Locate the rubber drain plug on the right side, remove it and us it to plug the left side drain
  • Replace the hose on the right side drain and fasten the retaining clip
  • At this point, you should prepare to install the control wire by removing the wire cover and wiring clip

Step 3

  • You can push the colour coded multi conductor wire through the inlet hole on the back of the air handler and pull a few inches through the front, please leave the cover open, you will make the wiring connections later
    Now you can carefully unfold the refrigerant pipe making sure not to crimp the copper tube, so to make sure it will fit easily through the wall, and installation support bracket is an optional tool that helps by acting as a second set of hands holding the air handler in place, while you then make the inside connections and prepare to mount the unit
  • You can then lift the unit into place and carefully pass the bundled pipes and wires through the wall opening
    Place the air handler on the wall mount making sure it is firmly secured and your refrigerant line condensate tube and electrical cables are completely passed through the wall
  • You can now make the multi conductor wire connections after cutting the length and stripping the wire, make the connections using the screwdriver, then replace the wiring clip, wiring cover, and close the front cover

Step 4

  • You are now ready to install the outdoor heat pump condenser, you should choose the outdoor units location based on the structure of your home, make sure the installation is convenient in the chosen location, you can place the unit on a pad mounted on an exterior wall using brackets
  • You need to ensure the outside unit is securely mounted with bolts through the footholds before making any connections with the condenser securely mounted, then you can proceed to make your outside connections
  • Please note that the air handler unit comes pressurized with nitrogen, you will hear a harmless gas release when you remove the plug
  • Ensure you connect the flared copper end of the line set to the pipe joint connected to the air handler using the adjustable wrench to hold the piping joint and prevent twisting
  • You now need to place the torgue wrench on the union nut and tighten to the setting specified in the manual, what you do next, is to connect the drain hose by push fit and secure with a tape
  • Make sure you carefully bend the two bundle to be flush with the wall making sure not to crimp the copper or drain tubing
  • You should know that the lines that covers are an optional accessory which hides the appearance of the refrigerant lines and control wires, you should mount the backing to your exterior wall and once the lines are run, you should snap the covers in place
  • Then remove the panel that covers the refrigerant valves and wiring connections, some models may already have the valves exposed, make sure to remove the protective screw caps from the valves
  • You can now proceed to connect the pipe joint of the outdoor unit to the copper line set
    You start the union nuts by hand, then use the torque wrench tightening to the specifications in your manual
  • Next, you need to connect the multi conductor wire that is run from the indoor air handler to the associated terminals on the outdoor unit
  • You need to double check the colour coding to make sure the wires have been connected correctly
    At this point, a trained professional is expected to complete the installation

Step 5

You will need to use a flare tool to create a new flare connection if you wish to cut the copper pipes incase they are too long and you want them shorter, ensure you use the pipe cutter in cutting the copper pipe tot eh desired length and then use a shaper to deeper the cut. Make sure to put your union nut in place first, then you insert the end of the pipe into a flare tool, NOTE that improper flaring is the mean reason for refrigerant leaks (you can refer to your installation manual for more details on making a proper flare connections). You have to make sure the flare connections is not tilted, cracked or damaged before connecting

Step 6

You need to make sure the refrigerant system is completely sealed in order for the system to perform properly, start with a pressure test to check for leaks. Use the dry nitrogen to pressurize the line set. Set the air handler at 100 to 200 psi, then using a soap bubble solution, you then spray down all of the flare joints and watch for bubbles to appear, if the bubbles are then present, you should tighten the union. Use the Vacuum pump and gauges to remove all the air and moisture prior to releasing refrigerant into the lines. After the vacuum is complete, then you need to close the manifold gauge valve, you can use an adjustable wrench to remove the service valve caps and the use an Allen wrench or hex key to fully open both service valves thereby releasing refrigerant into the system.

The condenser actually requires 220 volt of power from a dedicated circuit on the breaker panel which is run through an exterior manually mounted disconnect box. A qualified technician is required to install the circuit breaker disconnect box and make a high voltage connection to the condenser with the refrigerant released, ensuring all high and low voltage connections are complete.

At this point, it’s time to power up the Air Conditioner and do the initial startup

Start the AC with the remote and check that it’s operating properly, if it is.

Congratulations in completing your new installation

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