Comfort Control

Comfort Control Heating and Air Conditioning, Inc.

Service Pledges

Air Conditioning

Refrigerant Charge

To be properly calibrated, the refrigerant charge of your home’s air conditioning system must remain in a “goldilocks zone” – neither too low, nor too high, but just right. A low or high refrigerant charge reduces the capacity and efficiency of the system, leads to increased operating costs, and can cause compressor damage and shutdown. Our technicians assess the question of the system’s refrigerant charge by comparing temperature and pressure readings in a two-pronged approach: measuring the super-heat of the evaporator and the sub-cooling of the condenser.

Pledge: We will gauge the refrigerant charge using super-heat and sub-cooling measurements, and optimize the charge accordingly.

Air Filter

The condition of the air filter factors highly in the peak operation of your air conditioning system, and is one of the first and most frequently accessed areas for cleaning. If the air filter is dirty, the system not only has to work harder to circulate air through your vents, but you and your family may also suffer allergies and respiratory ailments due to breathing poor quality air. Most of the time, washing the air filter is all we need to do and it works like new; eventually, the air filter will degrade and we will replace it with a new one.

Pledge: We will wash or replace the air filter.


The machinery comprising your air conditioning system includes several motors and bearings that rotate and shear against each other. Lubricating oil enables the moving parts of the equipment to function smoothly, mitigating the friction that wears down the gear, reduces its efficiency and ultimately brings about its premature demise.

Pledge: We will lubricate the motors and bearings of the system.


When you input the desired temperature setting on your thermostat, you depend on the accuracy of its readings to determine when the air conditioning system should initiate cooling and lower the temperature to the mark you set. If the thermostat is improperly calibrated, the temperature it reads will not match the true state of your home’s environment, and the system will run longer than indicated. Every degree below 8 degrees of difference between your thermostat’s readings and the actual temperature will incur a 5% to 8% overrun to the cost of cooling your home.

Pledge: We check the thermostat for accuracy and calibrate it if necessary.

Controls and Safeties

Besides the thermostat, your air conditioning system includes several switches, fuses, circuit breakers and other controls for operational and safety purposes. Whether you interact with the controls or they regulate the system in the background, you depend on their proper calibration to keep the system running at its best. If the operational and safety controls stray from optimal settings, the false readings they provide may throw the system off balance, potentially leading to an increase in operating cost and the premature failure of other components.

Pledge: We will inspect and test controls and safeties.

Heat Pumps

Defrost Cycle Timing

The defrost timer regulates how often your heat pump stops heating the inside of the home in order to clear its outside parts of any ice that may be forming. Although defrost cycles are necessary for the heat pump to operate at peak condition and efficiency, if the timer triggers the defrost cycles too often or for too long, you will notice adverse effects: a reduction in the heating of your home and increased heating costs due to the inefficiency of the system. Over time, an improperly calibrated defrost timer can shorten the compressor’s life.

Pledge: We time the heat pump’s defrost cycles to make sure they conform to specifications.

Auxiliary Heat Strips

Under particularly cold conditions, the heat pump may struggle to raise the temperature to the level you have set in the thermostat. Auxiliary heat strips provide increased heating when the system requires a boost in capacity. Being a back-up contingency, the heat strips do not activate unless such acute conditions trigger them, but when they do come online you are thankful you have a second line of defense against the cold.

Pledge: We ensure that the auxiliary heat strips will activate when the system needs supplemental heating to keep you comfortable.

Reversing Valve

The direction of refrigerant flow in your heat pump determines whether your system puts out heating or cooling, according to how you’ve set the thermostat. The reversing valve functions as the master switch, in a sense, governing the direction of the flow and thus whether you will feel a change in temperature matching your expectations. If the reversing valve wears out, it can cause loss of heat – to the point of even further cooling an already cold room – and waste energy.

Pledge: We will verify that the reversing valve directs heat flow correctly and at peak efficiency.

Gas Heating Systems


A fundamental safety device of the gas heating system is the thermocouple. Mounted directly in the pilot flame, the thermocouple is an electric sensor that detects heat and controls the gas valve. If the pilot light is on, the thermocouple maintains the fuel supply open, but if the pilot light is out, the device senses the lack of flame and switches the gas valve closed. Consequently, the function of the thermocouple is to determine whether it is safe to keep the gas flowing through the system, or not.

Pledge: We will test the thermocouple for proper responsiveness to and, if necessary, replace it.

Gas Line

The integrity of the gas line that fuels your home’s heating system is critical to safety. The combustibility of gas is what makes it burn and provide heat to the heating system, but also what presents a danger to you and your family’s lives and property. Furthermore, gas leakage amounts to a wasted resource that you are paying for. Sound gas lines play a major part in keeping the heating system safe and efficient.

Pledge: We will check the gas line for leaks.

Fan Limit Switch

One of the most palpable indications that a heating system is working right is the temperature of the air that flows out of the vents. The system incorporates a fan limit switch that shuts off the fan if the temperature isn’t warm enough or if the temperature is too hot. Consequently, if you feel the fan blowing but the air coming out is cold, or if the room is already warm but the air keeps coming out, the fan limit switch may be malfunctioning.

Pledge: We check the fan limit switch and make sure it is operating correctly.

Blower Wheels

However effective your air filter, dust and grime end up accumulating on the blower wheels of the gas heating system. A telltale sign of dirty blower wheels is reduced airflow and shorter cycling times – the system turns on and off with increased frequency. The system continues to push air through, but it has to work harder and longer to do it. The result is decreased efficiency, higher operating costs and a greater strain on the system; one possible outcome is compressor failure.

Pledge: We will inspect and clean the blower wheels

Pilot Light

The pilot light provides a small, continuous source for the ignition of the main burner in a gas heating system. In order to stay on all the time, the pilot light is fed a minute but steady supply of gas. If the tube supplying the gas becomes dirty and clogged, the pilot light may go out, requiring you to manually reignite it. Although the thermocouple protects your system in the event that the pilot light goes out, for added safety as well as convenience, you should not find yourself relighting the pilot light frequently.

Pledge: Pilot light will be adjusted and its gas tube cleaned.