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Is your system running smoothly?

Spring Is Here!

Is your system running smoothly?

Serving Northeast Mississippi for Over 40 Years

Craftsmen in Comfort Since 1979

Scott has been a part of M&M Heating and Cooling since 1997, and in 2015, he became sole owner of the business after his father retired. After taking over the reins, Mattox has changed the approach of M&M Heating and Cooling to better reflect and respond to today’s market and its customers.

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Customer Testimonials

We love hearing from our customers! If you've had us work on your HVAC system we would love to hear from you too.

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Air Conditioner Replacement in Guntown, MS 38849

“The crew was very professional and courteous.”

– Jonathan T.

Air Conditioner Repair in Golden, MS 38847

“Excellent service!! Wonderful customer service….expert knowledge of heating and air.”

– Shawn & Lynita D.

Zone Control System Repair in Tupelo, MS 38801

“Greg was friendly and professional. Answered all my questions. I especially like the shoe covers! Thank you!”

– Tina H.

Our Latest Article...

Happy young hvac technician explaining air conditioner components to the woman homeowner in Tupelo, Mississippi.

Understanding Your Air Conditioner

April 9, 2019

As the philosopher Aristotle once said, “The whole is greater than the sum of its parts.” An air conditioner (AC) is no exception. It’s made out of many different parts, working together to keep you cool and comfortable. If one of these parts malfunctions, the air conditioner can’t function together as a whole.

To get the best value from your air conditioner, it’s important to have some knowledge of its basic components. This way, you can keep it properly maintained and make informed decisions when requesting service repairs. Our professional team at M & M Heating and Cooling likes to keep our customers informed. Call us at 662-844-0270 with any air conditioning maintenance questions.

What are its functions?

An air conditioner doesn’t only cool the air. It also removes humidity by decreasing the temperature of humid air. This shaves off much of the moisture from the air, improving indoor air quality (IAQ) and discouraging mold growth. It also improves indoor air quality by catching harmful particles in the air filter. This greatly lowers the risk of allergy flare-ups.

How does it make the air cool?

The air conditioner extracts heat from the indoors and pushes it outside. The heat is absorbed by the gas-state refrigerant (many use the name brand Freon®), then pumped to an outside coil. A fan blows the hot air out of the condenser (the big box unit outside). The air indoors becomes cold after having the heat removed. The refrigerant then repeats the process, continually extracting heat until the thermostat reaches the desired temperature.

What are its main components?

The standard central air conditioning system has four main components: the evaporator, the condenser, the expansion valve, and the compressor. The evaporator is located on the “cool side” (indoors), and the condenser and compressor are located on the “hot side” (outdoors). The expansion valve is in the middle of the two sides. Because of its indoor and outdoor components, this type of air conditioner is sometimes called a split-system air conditioner.

What does each component do?

The evaporator is where the refrigerant is received. By reducing the pressure, it converts the refrigerant from a liquid to a gas, hence the name “evaporator.”

The condenser receives the refrigerant vapor and converts it back into a liquid. This process is called a “heat transfer.”

The expansion valve is sandwiched between the evaporator and condenser. Its purpose is to facilitate the refrigerant’s journey from the evaporator to the condenser. By removing tension from the refrigerant, it allows the gas to undergo conversion.

The compressor puts pressure on the refrigerant. Using a big electric pump, it causes the refrigerant to convert back to its gas form.

We at M & M Heating and Cooling are proud to share our knowledge with you, our valued customer, here in Tupelo, MS, and surrounding areas. Call us now with any questions or to schedule a visit.

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Call us at 662-844-0270!

We Service All Brands

We service all HVAC brands.

We Service All Brands

We service all HVAC brands.

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