Our Most Frequently Asked Air Conditioning Questions

air conditioning FAQOver the years, our team at MRW Mechanical has answered more questions regarding the HVAC systems in our clients’ homes than we can keep track of. With that being said, there are a lot of the same questions that we are asked regarding air conditioning systems, and today, we’re answering them for you to save you time, money, and frustration!

Is it really necessary to replace the air filter in my air conditioning unit?

Regularly changing the air filter in your air conditioning unit is crucial, especially in households that suffer from asthma or allergies. Changing the filter every 3-months helps to improve indoor air quality and ensures your system doesn’t have to work harder than it has to, in turn helping your system run more efficiently. Regularly changing your air filter also helps eliminate dust and debris being pushed through your air conditioner.

How often should I be scheduling air conditioning maintenance?

We highly recommend at least one air conditioning maintenance appointment per year and suggest making the appointment in the spring before it gets too hot out. This allows our team to ensure your air conditioning system is working properly and make any repairs before the summer temperatures start creeping in.

Should I use the fan in my air conditioning system, or should I use my ceiling fan?

To keep your house cool and to help save money, we recommend keeping your air conditioning system on auto and using your ceiling fan to disperse the cool air evenly throughout your home.

What is a SEER rating?

Seasonal Energy Efficiency Ratio, also known as a SEER rating represents the efficiency of an air conditioning system. This ratio is determined by dividing the cooling output by power consumption. High-efficiency systems will have a SEER rating of 14 or higher and the more efficient your system is, the lower your cooling costs will be.

How long does an air conditioning system last?

The average air conditioning system has an expected lifespan of 12-15 years but with regular maintenance and repairs, your system can last even longer. If you’re debating whether to repair or replace your system, a good rule of thumb is to replace it if the repairs will cost more than 50% of the system’s current value.

My air conditioner is making a weird noise, what do I do?

All air conditioning systems make some noise when operating but if your system starts sounding a little off, it’s important to call a licensed HVAC technician as soon as possible. Noises to look out for including banging, clattering, squealing, and rattling and can be signs of loose, deteriorating, or failing parts.


To schedule your air conditioning maintenance, repair, or installation appointment or to learn more, contact MRW Mechanical today at (781) 639-9222.

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