Posted: July 28, 2025

5 Common Summer HVAC Problems

Home Cooling Issue? Is it a DIY Fix or Time to Call in the Pros?

When summer temperatures soar like they have in recent months, the last thing you want is for your central air conditioning to give you trouble. Fortunately, many air conditioning issues can be resolved with some simple troubleshooting, saving you time and money. But how do you know when a problem is a quick DIY job or when it’s time to call a professional HVAC technician?

This guide is tailored to help homeowners in Hanover and the South Shore tackle common HVAC problems, recognize the limits of their own repairs and know when expert assistance is necessary.

1. When Your A/C Won’t Turn On

You lower the temperature on your thermostat, but nothing happens. Don’t panic just yet. Here are some DIY steps:

• Check Thermostat Settings. Ensure your thermostat is set to “cool” and the temperature is lower than the current room temperature. Dead batteries on a thermostat can also bring the whole system to a halt.
• Ensure the Unit Has Power. Check your circuit breaker to see if the A/C breaker has tripped. Resetting it might solve the issue. Make sure the A/C switch near the unit hasn’t been accidentally turned off.

If these steps don’t work, there could be an issue with the wiring or an internal component failure within the unit. Contact a certified HVAC technician to investigate the cause.

2. When Your A/C is Blowing Warm Air

Few things are as frustrating as turning on your A/C only to feel warm air blowing out of the vents. Here are your troubleshooting options:

• Inspect Air Filters. Clogged filters can restrict airflow and reduce cooling efficiency. Replace or clean your air filters regularly to avoid this.
• Check the Outdoor Unit. Ensure there’s no debris blocking your outdoor condenser unit. Leaves, dirt or grass buildup can impede its operation.

If air filters and the outdoor unit are in good shape, the problem may lie with low refrigerant levels or a mechanical failure, such as a broken compressor. These are not DIY fixes and require a licensed technician to prevent further damage.

3. When You’re Experiencing Weak Airflow

If your A/C seems to be running but you’re barely feeling a breeze, weak airflow can quickly make your home uncomfortable. Here are some DIY options:

• Inspect Air Vents and Registers. Make sure all your vents are open and unobstructed by furniture, rugs or curtains.
• Keep Everything Clean. Check for any blockages in your ductwork or grille covers. Debris near the outdoor unit can also restrict airflow, so clear this area.

If weak airflow persists despite these fixes, the issue may involve clogged ductwork or a failing motor. Hiring an HVAC professional with the right tools can resolve this more efficiently.

4. When You Hear Strange Noises from Your Unit

Hearing rattling, squealing or banging from your A/C? It’s likely a sign of mechanical issues like loose parts or failing motors — problems DIY fixes can’t solve. Check for external obstructions like branches in the outdoor unit, but noises could also mean loose fan blades, damaged compressors or worn belts. Prevent further damage by calling a qualified HVAC technician.

5. When Liquid is Leaking Around the Unit

Finding liquid near your A/C is concerning, but not all leaks are the same:

• Identify the Leak. If you find water, it could be due to a clogged condensate drain line or a damaged drain pan. These issues can often be resolved by clearing the blockage with a wet/dry vacuum or replacing the pan.
• Is It a Refrigerant Leak? If the leak appears oily or the refrigerant levels in your system are low, never attempt a refrigerant leak fix on your own. Handling refrigerant requires specialized training and certifications.

Need Professional HVAC Repairs? Call Frank Lamparelli!

Dealing with HVAC issues can be stressful, especially during Hanover’s sweltering summer afternoons. If you’ve tried the simple fixes and your system still isn’t delivering comfort, Frank Lamparelli is here to help. We offer HVAC services throughout Hanover and the South Shore, from repairs and maintenance to brand-new system installations.

Give your family the cooling comfort they deserve. Contact Frank Lamparelli today to schedule your HVAC service or consultation.