Steps of Air Conditioning Repair in Philadelphia



In order to do your own air conditioning repair in Philadelphia you need to understand the unit’s sequence of operation. This is the order of events the system undergoes to cycle itself on and off. Knowing how the unit operates properly aids in determining where to start troubleshooting when the system doesn’t operate properly. Where the system varies from its normal sequence is a major clue to any problems.

Most of our calls for air conditioning repair in Philadelphia are simple fixes that can be done easily by homeowners but a few require knowledge of the operation of mechanical and electrical components of the system



  1. The compressor pumps out compressed high-pressure, superheated refrigerant vapor.


  1. Vapor passes through the outdoor finned condenser coil. Air from the outdoor fan removes heat from the refrigerant vapor. When enough heat is removed, the vapor condenses into a high-pressure liquid. The liquid temperature is slightly warmer than ambient air temperature.


  1. This warm, high-pressure liquid leaves the outdoor coil, and flows through the copper refrigerant liquid line.


  1. At the end of the liquid line, the refrigerant passes through a metering device, reducing its pressure and temperature.


  1. As the liquid, under reduced pressure, enters the indoor coil surface, it expands and absorbs heat from the indoor air passing over the finned surface. Heat, from the indoor air, causes the low-pressure liquid to evaporate and cools the indoor air. The refrigerant is now a cool vapor.


  1. Refrigerant vapor flows through the suction line to the compressor. The cycle then repeats.


The electrical cycle in order

  1. The thermostat calls for cooling.
  2. This sends a 24-volt signal through the “Y” terminal to the compressor contactor in the outdoor unit. The compressor and outdoor fan start.
  3. At the same time a 24-volt signal flows through the “G” terminal to the indoor blower relay. The indoor blower starts.
  4. The cooling system is now in operation.
  5. The thermostat satisfies and ends the call for cooling.
  6. This ends the 24-volt signal to the compressor contactor and the outdoor unit stops.
  7. This ends the 24-volt signal to the indoor blower relay and the indoor blower stops.
  8. The system is now off.


If you have any air conditioning repair questions and live in the greater Philadelphia area, feel free to contact us


HVAC Repair Philadelphia Residents Can Do

As complex as HVAC systems are, here is a list of HVAC repair Philadelphia residents can do before calling their Heating and Air Conditioning service contractor


HVAC system not running

Most of the time the reason for HVAC systems sudden quietness is a lake of electric power, check your breakers, if on then move forward the heater and make sure the emergency switch is turned on.


Heater blower is on but condenser is off

Your outside condenser needs high voltage from the breaker panel and two thermostat wires from the heater’s circuit board to run, again look for a double pole breaker and make they are on then follow a thin wire between the heater and the condenser if you see the wire is not insulated at any point then you will need to insulate the wire and replace a small fuse at heater’s circuit board.


Outside condenser or inside coil  frozen

When did you replace your air filter? pull the air filter out of the heater, wait two minuets and watch your the ice melt away. if not go around the house and confirm that all of your supply and return vents are open and not blocked


Check your thermostat

Wall thermostats are signal controllers, they tell the system what to do.If your thermostat is off or the room temperature is satisfying the thermostat, your heating and cooling system will not need to run,

More often than not HVAC repair Philadelphia contractors are called to fix issues as minor as these minor


More Complicated issues

If your heating and air conditioning system is running and you are able to feel good air pressure through your vents but your air is not conditioned enough to achieve the set temperature on your thermostat, then you will need a variety of tools and experience in the system’s sequence of operation and you should contact your local HVAC Repair Philadelphia Contractor.






Guide to AC Replacement in Philadelphia


It is mid-April; Hot summer nights are weeks away, is it too early to worry about your dead AC replacement in Philadelphia when spring is time for lawn care and cleaning out attics and garages? In this short article I am going to show you why addressing your AC replacement in the early spring could help you get a better system and enables you spend less of your money.


Quality AC Replacement requires no rush

We all know that three quotes is a standard practice.  Good shoppers don’t always buy bargains. Buying durable Air Conditioners that come with long warranties should be the number one item on your list and negotiating an additional year or two of free labor warranty should not be ignored.

Evaluating your three contractors comes second as you will need to spend a bit of time checking with organizations like the better business bureau, your local chamber of commerce and reading some of the contractors reviews, thanks the internet you can accomplish your task in no time.


Beware of Oversize Air Conditioners

It may sound strange, but too much cooling capacity will make an AC system less efficient.  system will cycle on and off frequently, exposing the components to excess wear and tear. Air conditioner’s Job is not only to cool down your home’s air temperature but it should also de-humidify, oversized systems tend to cycle off before humidity is removed from your home.


Think Locally

Your HVAC contractor should always be a short-distance call away. These sophisticated modern more efficient air conditioning systems require occasional checkups by service people familiar with their design and installation. An industry study shows that half of all service calls were the result of improper or insufficient maintenance.


Compare cost

Keep in mind, HVAC Contractors do not manufacture HVAC systems, all companies who offer AC replacement in Philadelphia buy their units from the same local distributor. Listen to your three estimators and ask for an estimate for a good system and a more efficient system, be sure to get all model numbers included.


The process of getting a good AC replacement in Philadelphia requires time and home work by home owners, running into a fast decision can be costly, do not wait till it is 90 degrees’ outside to call for HVAC services.