Top HVAC Repair Issues and Solutions

When it comes to keeping our homes comfortable year-round, our HVAC systems play a starring role. But like any complex equipment, they can run into problems. Over time, wear and tear, weather changes, and simple neglect can cause issues that disrupt heating and cooling. The good news? Many common HVAC repair issues are straightforward to diagnose and fix. Today, let's walk through some of the most frequent problems we see and how to tackle them effectively.

Common HVAC Repair Issues You Should Know About

Understanding the typical HVAC problems can save you time, money, and stress. Here are some of the most common issues homeowners and property managers encounter:

1. Dirty or Clogged Filters

One of the simplest yet most overlooked problems is a dirty air filter. When filters get clogged with dust and debris, airflow reduces drastically. This forces your system to work harder, leading to higher energy bills and potential damage.

What to do:

• Check your filters monthly, especially during heavy use seasons.

• Replace or clean filters every 1-3 months depending on the type.

• Consider upgrading to high-efficiency filters for better air quality ** but remember, the higher quality filters MUST be changed on a more strict schedule. They block more particles, but with that, can get dirty quicker, and clog faster causing issues with your system.

  
  

2. Refrigerant Leaks

If your air conditioner or heat pump isn’t cooling properly, a refrigerant leak might be the culprit. Low refrigerant levels reduce cooling efficiency and can damage the compressor.

Signs of a leak:

• Hissing or bubbling sounds near the outdoor unit.

• Ice (not frost) buildup on refrigerant lines.

• Warm air blowing from vents (in cooling mode).

  
  

Solution:

• Call a professional to locate and repair leaks.

• Recharge refrigerant to the correct level.

• Regular maintenance can help catch leaks early - Delta T Comfort notates the actual number of your equipments subcool, super heat, and temperature differentals. Those numbers can help tell us how your system is fuctioning and if it is a "watch it over time" or "this is more urgent" matter.

  
  

3. Thermostat Malfunctions

Sometimes the problem isn’t the HVAC system itself but the thermostat controlling it. Faulty wiring, dead batteries, or outdated models can cause inconsistent temperatures or system cycling.

Tips:

• Replace batteries regularly.

• Upgrade to a programmable or smart thermostat for better control.

• Ensure the thermostat is installed away from heat sources or drafts.

• If you have a smart thermostat, make sure it is connected to Wi-Fi and gets regular updates if it is a model that requires those

  
  

Digital thermostat controlling home temperature

4. Frozen Evaporator Coils

When airflow is restricted or refrigerant is low, evaporator coils can freeze. This stops the system from cooling and may cause water damage when the ice melts.

How to fix:

• Turn off the system and let the ice thaw.

• Replace dirty filters and open all supply vents (yes even the ones in the rooms you don't use)- or move whatever is covering them

• Schedule a professional inspection to check refrigerant levels and airflow.

  
  

5. Frequent Cycling

If your HVAC system turns on and off too often, it’s called short cycling. This can wear out components quickly and increase energy costs.

Common causes:

• Oversized system for the space (this is why for estimates, we require a site visit, so we can verify information and preform a loadcalulation, and measure ductwork, taking into account the shape.

• Dirty filters or blocked vents.

• Thermostat issues.

  
  

What to do:

• Have a technician evaluate system size and settings.

• Keep filters clean and vents unobstructed.

• Consider thermostat upgrades.

  
  

What is the $5000 Rule for HVAC?

You might have heard about the "$5,000 rule" when it comes to HVAC repairs and replacements. It’s a handy guideline to help decide whether to repair or replace your system.

Here’s how it works:

• If the cost of repairs approaches or exceeds $5000, it’s often more cost-effective to replace the entire system - depending on the age of the equipment - we always check warranty on the equipment prior to quoting repairs - average lifespan of a well maintained HVAC system is 12-15 years.

• Newer systems are more energy-efficient, which can save money in the long run.

• Older units may have frequent breakdowns, making repairs a recurring expense- especially if maintenance has never been your priority.

  
  

This rule isn’t set in stone but gives a practical benchmark. Always consider the age of your system, repair history, and energy costs before making a decision.

Technician evaluating HVAC system for repair or replacement

Preventive Maintenance Tips to Avoid Costly Repairs

Prevention is always better than cure, especially with HVAC systems. Regular maintenance keeps your system running smoothly and extends its lifespan.

Here are some simple steps we recommend:

• Schedule annual tune-ups: A professional inspection can catch small issues before they become big problems. You wouldn't drive your older car 20k miles with no oil change

• Keep outdoor units clear: Remove leaves, dirt, and debris around your condenser unit - leave 3 foot space around the unit.

• Seal ductwork: Leaky ducts reduce efficiency and increase wear on your system.

• Monitor system performance: Pay attention to unusual noises, smells, or temperature changes.

• Use a programmable thermostat: This helps reduce unnecessary system use and wear.

  
  

By staying proactive, you can avoid many common repair headaches and enjoy consistent comfort.

When to Call for Professional HVAC Repairs

While some maintenance tasks are easy to handle, many HVAC issues require expert attention. If you notice any of the following, it’s time to reach out for professional help:

• Persistent strange noises or smells.

• System won’t turn on or off properly.

• Uneven heating or cooling in different rooms.

• Water leaks around the unit.

• Frequent cycling or short cycling.

• Visible damage to components.

  
  

Remember, attempting DIY fixes on complex HVAC systems can sometimes cause more harm than good. Trusting experienced technicians ensures safe, reliable, and efficient repairs.

If you’re looking for trusted professionals in the Kitsap area, Delta T Comfort, LLC offers top-quality service and dependable solutions for all your heating and cooling needs.

Outdoor HVAC unit installed in a residential backyard

Keeping Your Home Comfortable Year-Round

We all want our homes to be cozy in winter and cool in summer without worrying about sudden breakdowns. By understanding these common HVAC repair issues and following simple maintenance tips, you can keep your system running efficiently and avoid costly surprises.

Thanks for joining me on this journey through HVAC troubleshooting. With a little care and the right help, your heating and cooling system will serve you well for years to come. Here’s to comfortable living and peace of mind!