Furnace Troubleshooting: Common Problems and How to Fix Them
As the temperatures drop in Castle Rock, the last thing any homeowner wants is a malfunctioning furnace. Unfortunately, furnace issues can arise at the most inconvenient times, leaving you cold and frustrated. Before you panic, it’s worth knowing that some common furnace problems can be resolved with a little troubleshooting. In this blog, we’ll walk you through a few furnace issues and how to fix them, as well as when it’s time to call for furnace repair in Castle Rock.
1. Furnace Won’t Turn On
One of the most common issues homeowners face is a furnace that simply won’t start. This can be caused by several factors, but the good news is that many are easy to address.
Troubleshooting Steps:
Check the Thermostat: Ensure that your thermostat is set to “heat” and that the temperature setting is above the current room temperature. If your thermostat is battery-powered, try replacing the batteries.
Check the Power: Make sure your furnace is getting power. Check the circuit breaker to see if it has tripped. If so, reset it.
Inspect the Pilot Light: For older gas furnaces, a blown-out pilot light can prevent the furnace from igniting. Relight the pilot following the manufacturer's instructions.
If none of these steps solve the issue, it’s time to call a professional for furnace repair in Castle Rock.
2. Furnace Blowing Cold Air
If your furnace is running but only blowing cold air, there could be a few causes for this frustrating problem.
Troubleshooting Steps:
Check the Thermostat Fan Setting: If the fan is set to “on” rather than “auto,” the blower will continue running even when the furnace isn’t heating. Set the fan to “auto” so it only runs when the furnace is actively heating.
Check the Air Filter: A dirty or clogged filter can restrict airflow, causing the furnace to overheat and shut off before warming the air. Replace or clean the filter if it’s dirty.
Inspect the Pilot Light or Ignition System: In gas furnaces, the pilot light or ignition system might not be working correctly. If the pilot light is out or the electronic ignition fails, the furnace won’t be able to heat the air.
If none of these fixes work, you may have a more serious issue, like a malfunctioning thermocouple or ignition system. In that case, a professional technician will need to inspect and repair it.
3. Furnace Is Short Cycling
When a furnace frequently turns on and off in short bursts, this is known as “short cycling.” Not only does this make it difficult for your home to stay warm, but it also puts extra strain on your furnace, leading to more wear and tear.
Troubleshooting Steps:
Check the Air Filter: As mentioned earlier, a clogged air filter can cause your furnace to overheat and shut down prematurely. Replacing the filter might solve the problem.
Inspect the Thermostat: A malfunctioning thermostat or one placed in an area prone to drafts can cause the furnace to short cycle. Try relocating the thermostat or replacing it if necessary.
Check for Blocked Vents: Make sure that none of your home’s air vents are blocked by furniture or other obstructions, which can cause airflow issues and short cycling.
If short cycling continues, it may indicate a more significant issue such as an oversized furnace or a malfunctioning heat exchanger, which requires professional attention.
4. Unusual Noises from the Furnace
Your furnace will make some noise when it runs, but if you hear banging, rattling, or squealing sounds, it could be a sign of trouble.
Troubleshooting Steps:
Check for Loose Panels: Sometimes, banging or rattling noises are caused by loose furnace panels. Check to make sure all panels are securely fastened.
Inspect the Blower Motor: Squealing sounds can indicate an issue with the blower motor or a worn-out belt. While you can inspect the belt for damage, it’s best to have a professional technician handle any repairs related to the blower motor.
Look for Ductwork Issues: Loud noises can also result from expanding or contracting ductwork. In some cases, adding insulation around the ducts can help reduce noise.
If you’re unsure of the cause, contact a heating specialist for an inspection to avoid further damage.
5. Furnace Running Constantly
If your furnace seems to be running non-stop, it can lead to higher energy bills and more wear on the system.
Troubleshooting Steps:
Check the Thermostat: Ensure the thermostat is not set too high. If the temperature is set much higher than the current room temperature, the furnace may struggle to reach it, causing it to run constantly.
Check the Fan Setting: If the fan is set to “on,” the blower will run continuously, even when the furnace isn’t heating. Switching the fan to “auto” may solve this issue.
Inspect the Limit Switch: A malfunctioning limit switch could cause the furnace to run constantly. While this requires a professional repair, it’s important to address it quickly to avoid further strain on the system.
When to Call for Professional Furnace Repair
While many of these furnace problems can be solved with basic troubleshooting, some issues require the expertise of a licensed technician. If you’ve tried the above steps and your furnace still isn’t working properly, it’s time to call a professional for furnace repair in Castle Rock.
At Courtesy Plumbing & Heating, we specialize in diagnosing and repairing all types of furnace issues. Our experienced technicians can quickly identify the problem and provide reliable, affordable repairs to ensure your home stays warm and comfortable all winter long. Don’t wait until it’s too late—contact us today to schedule your furnace repair!
