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  2. 5 things you should (and should not) do to make your AC unit ...

    www.aol.com/news/5-things-not-ac-unit-140622695.html

    5 expert tips for making your air conditioning unit run better. Here’s what Smith recommends: 1. Annual maintenance: “Have a professional come check the controls to make sure the electricity ...

  3. The One Winter Maintenance Task Experts Say You Should ... - AOL

    www.aol.com/one-winter-maintenance-task-experts...

    In fact, according to our experts, failing to take some time to walk around you and thoroughly inspect crevices for gaps or cracks in your home can cause major problems for you comfort-wise and ...

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    Some signs that could lead to a potential problem is if the HVAC system does not provide air cool enough. [citation needed] That could be due to a leakage in the cooling fluids. Another sign that could mean that the HVAC system is not running perfectly fine is if there is a bad smell to the air that it is providing.

  5. Should You Cover Your AC Unit In The Winter? Experts Explain

    www.aol.com/cover-ac-unit-winter-experts...

    Once the colder months start to make an appearance, so does your home's heating system. The AC unit temporarily becomes thing of the past but that doesn't mean it's long forgotten.

  6. Thermal expansion valve - Wikipedia

    en.wikipedia.org/wiki/Thermal_expansion_valve

    A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible. A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator. As a refrigerant passes through a circuit containing these four elements, air ...

  7. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    An air conditioning system, or a standalone air conditioner, provides cooling and/or humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system intended to maintain constant indoor air conditions.

  8. Troubleshooting - Wikipedia

    en.wikipedia.org/wiki/Troubleshooting

    Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.

  9. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    A thermostat exerts control by switching heating or cooling devices on or off, or by regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. A thermostat can often be the main control unit for a heating or cooling system, in applications ranging from ambient air control to automotive coolant control.