15 Oct How to troubleshoot common fall HVAC problems
The Most Common Fall HVAC Problems
As fall approaches and temperatures begin to drop, it’s time to shift focus from cooling to heating. Residential HVAC systems, responsible for keeping your home comfortable year-round, are under new demands as the season changes. With these demands come common fall HVAC issues that can disrupt comfort and lead to costly repairs if not addressed early.
Knowing what to look for can help you avoid stress. It can also keep your home warm and energy-efficient during the colder months.
In this blog post, we will look at common fall HVAC problems that you may face in the coming weeks. We will share tips on what to watch for and we’ll also give advice on how to maintain your system for the upcoming season.
1. Dirty or Clogged Filters
A leading cause of HVAC problems, no matter the season, is a dirty or clogged air filter. In the fall, as you transition from cooling to heating, it’s important to check and replace your filter regularly.
Why It’s a Problem:
Dirty filters restrict airflow, forcing your system to work harder than necessary. This not only impacts the efficiency of your HVAC but can also lead to overheating, short cycling, or even complete system failure.
What to Watch For:
- Increased energy bills without a change in usage
- Weak airflow from vents
- Dust buildup around vents and in your home
Solution:
It is best to change your HVAC filter every 1 to 3 months. This depends on the filter type and the dust, pet hair, or allergens in your home. A clean filter ensures better airflow and helps prevent bigger problems down the line.
2. Thermostat Issues
As you switch from cooling to heating, thermostat issues may arise. Whether it’s a simple calibration problem or a malfunctioning thermostat, these issues can lead to inconsistent temperatures and discomfort.
Why It’s a Problem:
If your thermostat isn’t working right, it may not send the correct temperature settings to your HVAC system. This can cause the system to overwork or fail to heat your home properly.
What to Watch For:
- The HVAC system runs constantly or not at all
- The thermostat reading doesn’t match the actual temperature in your home
- Irregular or uncomfortable indoor temperatures
Solution:
Check to ensure your thermostat is set to heating mode and that the correct temperature is selected. If issues persist, it may be time for a new thermostat, especially if you’re still using an outdated manual model. Upgrading to a programmable or smart thermostat can help you better manage your home’s temperature and energy usage.
3. Pilot Light or Ignition Problems
Older furnaces may rely on a pilot light to ignite the heating process, while newer models often use electronic ignition systems. Either type can encounter issues when transitioning to fall.
Why It’s a Problem:
A faulty pilot light or ignition system can prevent your furnace from producing heat, leaving your home cold and uncomfortable.
What to Watch For:
- No heat when the system is on
- The pilot light is out or flickering (in older models)
- Clicking noises from the ignition system but no heat
Solution:
If you notice pilot light problems, try relighting it if you’re comfortable doing so. For ignition issues in newer systems, it’s best to contact a professional HVAC technician to inspect and repair the problem. Regular maintenance of your furnace can also help prevent ignition failures.
4. Leaky Ductwork
Ductwork plays a critical role in distributing heated air throughout your home. Over time, ducts can develop leaks or become disconnected, leading to wasted energy and uneven heating.
Why It’s a Problem:
Leaky ducts reduce the efficiency of your HVAC system, causing it to work harder and consume more energy. Additionally, leaks can introduce dust, allergens, and other pollutants into your home’s air, affecting indoor air quality.
What to Watch For:
- Hot and cold spots in different areas of your home
- Higher-than-usual energy bills
- Dust buildup around vents and in rooms
Solution:
Regular duct inspections and sealing are key to preventing leaks. If you suspect your ducts are leaking, it’s a good idea to have a professional perform a ductwork inspection and sealing service.
5. Blocked or Dirty Air Vents
In the fall, homeowners often rearrange furniture or close vents to prepare for the colder months. While this might seem like a good idea, blocking or closing too many vents can negatively impact your HVAC system.
Why It’s a Problem:
Blocking air vents can cause pressure imbalances in the system, leading to restricted airflow and reducing the efficiency of your HVAC. Over time, this can lead to wear and tear on your system’s components.
What to Watch For:
- Uneven heating in different rooms
- Weak airflow from vents
- Unusual noises from the system as it works harder
Solution:
Ensure that all vents are open and unobstructed by furniture or other items. Regularly clean vents and registers to prevent dust buildup and allow for optimal airflow throughout your home.
6. Heat Pump Malfunctions
For homes with heat pumps, fall is a time when the system switches from cooling to heating mode. Heat pumps rely on refrigerant to transfer heat, and any issues with refrigerant levels or the system’s defrost cycle can lead to problems.
Why It’s a Problem:
If your heat pump is low on refrigerant or the defrost cycle isn’t working properly, the system may not produce sufficient heat, leading to discomfort and inefficiency.
What to Watch For:
- Ice buildup on the outdoor unit
- Reduced heat output
- Unusual noises coming from the heat pump
Solution:
If you notice ice buildup or reduced heat from your heat pump, it’s time to call an HVAC professional. Regular maintenance, including checking refrigerant levels and the defrost cycle, can prevent these problems and keep your heat pump functioning properly.
7. Furnace Cycling Issues
As fall sets in, your furnace may begin to cycle on and off more frequently. While some cycling is normal, short cycling—when the furnace turns on and off too quickly—can indicate an underlying issue.
Why It’s a Problem:
Short cycling can lead to increased wear and tear on your furnace, reduce energy efficiency, and leave your home without adequate heat.
What to Watch For:
- Furnace turns on and off quickly and frequently
- Uneven heating throughout the home
- Unusually high energy bills
Solution:
If your furnace is short cycling, it may be due to a dirty filter, thermostat issues, or a more serious mechanical problem. Start by checking the filter and thermostat settings, but if the issue persists, contact a professional for a thorough inspection.
8. Carbon Monoxide Leaks
One of the most serious concerns with heating and air systems is the risk of carbon monoxide leaks, especially in gas furnaces. Fall is a good time to check for any potential leaks or issues that could put your family’s safety at risk.
Why It’s a Problem:
Carbon monoxide is an odorless, colorless gas that can be deadly if inhaled. Leaks can occur when the heat exchanger in your furnace cracks or when there’s poor ventilation.
What to Watch For:
- Yellow or flickering pilot light
- Excess moisture on windows or walls
- Soot buildup around the furnace
Solution:
Install carbon monoxide detectors near your furnace and throughout your home. Schedule an annual furnace inspection to check for leaks and ensure your system is operating safely.
Final Thoughts
Fall is the perfect time to schedule routine HVAC maintenance to ensure your system is ready for the colder months.
By watching for these common fall HVAC problems and fixing them early, you can save on energy costs. This will help your HVAC system last longer and keep your home comfortable and safe all season.
If you have any of the issues listed above or want to schedule a fall HVAC tune-up, contact TMC today. We can provide expert service and advice and get your HVAC unit running smoothly.