Even in warm climates like Palm Beach County, winter cold fronts can make a working furnace important for comfort. Many homes in the area were built decades ago, so aging equipment or older duct systems can be more prone to early-season issues. If your furnace is not keeping up, a few basic troubleshooting steps may help you find the cause before you call for service.
Check Your Thermostat First
Thermostat problems are one of the most common reasons for a furnace not turning on. Make sure it is set to heat and that the temperature is set above the current room temperature. If the screen is blank or slow to respond, try replacing the batteries.
Inspect Your Air Filter
A clogged or dirty air filter can restrict airflow and make the furnace work harder than it should. If the filter looks dusty or gray, replace it with a new one before running the system again. Clean airflow is key to safe and consistent heating.
Make Sure Vents and Returns Are Open and Clear
Closed or blocked vents can create uneven heating or cause the furnace to cycle on and off more often. Move furniture, curtains, and rugs away from vents and return grills. Good airflow helps your system run smoothly.
Listen for Unusual Sounds
Rattling, banging, or grinding noises can be signs of loose components, blower motor problems, or wear inside the furnace. If you notice new or unusual sounds, it is best not to ignore them, especially when the furnace is running more often during cooler weather.
Watch for Short Cycling or Weak Airflow
Short cycling, when the furnace starts and stops frequently, can be caused by overheating parts or a dirty flame sensor. Weak airflow may be a sign of blocked returns, dirty coils, or a struggling blower motor. These issues often show up when the furnace is working harder during a cold front.
When to Call Crest Air
If these steps do not restore heat or you notice burning smells, repeated shutdowns, or electrical issues, it is time to call for help. Crest Air offers 24/7 emergency service throughout Palm Beach County. Our team brings 72 years of combined experience, NATE-certified technicians, and trusted expertise with Trane and Daikin systems to keep your home comfortable.
SPECIALISTS