A furnace failure can be a stressful situation, especially during Boise’s cold winters. If your furnace won’t start, it’s important to figure out what’s wrong quickly to bring back the heat. Use this guide to check common issues and get your furnace working again.
1. Check the Thermostat
Before diving into more complex fixes, always start with the basics: check the thermostat. A malfunctioning thermostat is often the reason for a furnace not turning on. Here’s what to check:
- Set to Heat Mode: Ensure the thermostat is set to “heat” mode and that the temperature is set high enough to trigger the furnace to start.
- Replace Batteries: If your thermostat uses batteries, replace them to ensure proper functionality.
- Check the Settings: Verify the settings, including the fan, are correct for heating your home.
If the thermostat is set properly and the furnace still won’t start, it’s time to move on to other HVAC troubleshooting steps.
2. Inspect the Power Supply
Your furnace needs a consistent power supply to run. If the furnace isn’t starting, check the power:
- Circuit Breaker: Make sure the furnace’s circuit breaker hasn’t tripped. If it has, flip it back to the “on” position.
- Power Switch: Many furnaces have a power switch on the side. Ensure that it is in the “on” position.
- Furnace Disconnect: If your furnace has a disconnect switch, confirm that it hasn’t been turned off by mistake.
If everything seems connected but there’s no power, you might need a professional electrician to check the wiring.
3. Examine the Pilot Light or Ignition System
For gas furnaces, a common reason for startup issues is a malfunctioning pilot light or ignition system.
- Check the Pilot Light: If you have a traditional pilot light furnace, make sure the pilot light is lit. If it’s out, follow the manufacturer’s instructions for relighting it.
- Ignition System: If your furnace uses an electronic ignition system, ensure it is working properly. Faulty ignition systems are usually best handled by a professional technician for HVAC.
If the pilot light won’t stay lit or the ignition system is faulty, the issue could be with the thermocouple or the gas valve, which requires professional repair.
4. Look for Blocked Airflow
Proper airflow is critical for furnace operation. If there is a blockage in the air vents or ducts, it could prevent the furnace from starting or cause it to overheat.
- Check the Air Filter: A dirty or clogged air filter can restrict airflow. Replace the air filter if it looks dirty or hasn’t been changed in a while.
- Inspect Vents: Ensure that all vents are open and not blocked by furniture or other obstructions.
If the airflow in your furnace is restricted, this can prevent it from starting or can cause it to shut down. So, it’s essential to ensure proper ventilation for smooth operation.
5. Call a Professional
If you’ve tried all these steps and none of them seem to work, it’s time to call a professional technician of HVAC in Boise. Furnace repairs can be complex and potentially dangerous, especially if it involves the gas supply or electrical components. A professional technician can:
- Accurately diagnose the problem.
- Provide safe and reliable repairs.
- Perform routine maintenance to prevent future issues.
Don’t Wait for Cold Nights—Get Your Furnace Fixed Today!
A malfunctioning furnace can be more than just inconvenient—it can make your Boise home uncomfortable during the colder months. If your furnace won’t start or you’re unable to troubleshoot the issue, Innovative Mechanical Solutions is here to help. Call us today to schedule an inspection and get your furnace running smoothly!
