Expert Solutions for Keeping Your Home Comfortably Cool All Summer Long


Welcome to the sunny side of San Jose, CA, where the sun shines bright and the temperatures often follow suit! At Mr. Reliable Plumbing & Heating, we know just how crucial a functioning air conditioner is to making your home a refuge from the heat. That’s why we’ve compiled a guide to help you understand common air conditioning issues and what you can do to fix them before dialing for help.

Air conditioners, while essential, can sometimes be unpredictable—failing to cool properly or leaking unexpectedly, which can baffle even experienced homeowners. Small issues, if overlooked, can escalate into costly repairs and system inefficiencies. Therefore, addressing problems promptly and adhering to a regular maintenance schedule are crucial for ensuring your AC operates effectively and enjoys a prolonged lifespan.

Mr. Reliable Plumbing A/C HVAC company van

Common Air Conditioning Problems

AC Not Cooling Properly

  • Symptoms and Causes

It’s a sweltering day outside, and your AC is on but not making a dent in the indoor temperature. Common culprits include clogged air filters, incorrect thermostat settings, or more severe issues like refrigerant leaks.

  • Practical Solutions and Tips

Start simple: check that your thermostat is set to cool and that all vents are unblocked. Replacing your air filter every few months can prevent many cooling issues. Still not working? It might be time to call in the professionals.

AC Leaking Water

  • Internal Leaks and Their Implications

Water pooling around your indoor unit can indicate a clogged condensate drain line or a malfunctioning condensate pump. These need to be addressed quickly to avoid water damage to your home.

  • External Leaks and Environmental Factors

Seeing water outside around your condenser unit on hot days is normal, but watch out for leaks in cooler weather, which could signal a freezing problem.

  • Solutions to Address Water Leaks

For internal leaks, try to clear the condensate line using a vacuum or a plumber’s snake. If the problem persists, the drain pan or pump might need replacing—something we can help with!

AC Operational Issues

  • AC Not Turning On

First, ensure your thermostat is correctly set and that there’s power to your unit. Check your home’s circuit breakers and the outdoor disconnect box.

  • AC Running Continuously

If your AC seems to run nonstop, check for a dirty air filter first. If cleaning or replacing it doesn’t help, your unit might be improperly sized for your home or there might be an issue with the thermostat.

  • Solutions to Operational Problems

Simple thermostat issues can often be resolved with new batteries or recalibration. More persistent problems may require a look at the electrical components or a consultation on whether your AC unit is appropriately sized for your space.

AC Fan-Related Problems

  • Indoor Fan Issues

If the indoor fan isn’t working, check for tripped circuit breakers or ice buildup on the evaporator coils. Sometimes, just giving the system time to thaw and resetting the breaker can get things moving again.

  • Outdoor Fan Issues

A non-operational outdoor fan could jeopardize your system’s ability to effectively cool your home and might damage the compressor. Check the capacitor or inspect for any obstructions. If unsure, it’s safest to call for a technician.

Advanced Air Conditioning Problems

Short Cycling and Its Impact

Short cycling, where your AC turns off and on more frequently than it should, stresses your system and can hike up your energy bills. This often stems from an oversized AC unit or a refrigerant issue.

Unusual Noises and What They Indicate

Banging, screeching, or rattling noises are not part of your AC’s normal repertoire. These sounds can indicate anything from a loose part to a failing compressor.

Thermostat Malfunctions and Impact on AC Performance

An erratic thermostat can cause irregular cooling and increased energy usage. Digital thermostats may need recalibrating, while older models might need to be replaced.

Preventive Measures and Maintenance Tips

Importance of Regular Maintenance

Regular check-ups can prevent the majority of common AC problems. At Mr. Reliable Plumbing & Heating, we offer seasonal tune-ups to keep your system in tip-top shape.

DIY Maintenance Tips

Changing your filters regularly, keeping your outdoor unit clear of debris, and ensuring your indoor vents are unobstructed can all help maintain your AC’s efficiency.

When to Call a Professional

If you’ve run through the basic troubleshooting steps without success, or if you’re uncomfortable performing them yourself, it’s time to call us. Better safe than sorry, especially when it comes to keeping your home cool and comfortable.


Regular maintenance is your best defense against air conditioning troubles—make sure to keep those filters fresh and never ignore the warning signs. At Mr. Reliable Plumbing & Heating, we’re ready to assist with everything from routine check-ups to urgent repairs, ensuring your AC runs smoothly throughout the hot San Jose summers. If you find yourself facing AC issues that DIY solutions can’t fix, don’t hesitate to reach out for professional help on our contact page. Stay cool and let us handle the complexities of your AC needs!