August 1, 2024
Common Furnace Problems and DIY Fixes in Durham, CT

Introduction
Having a properly functioning furnace is essential for maintaining a comfortable home environment during the cold winter months. However, like any other appliance, furnaces can experience problems from time to time. In this article, we will explore some of the most common furnace problems homeowners in Durham, CT may encounter and provide DIY fixes that can help resolve these issues. Whether you are in need of a furnace repair service or simply looking to troubleshoot minor problems yourself, this guide will offer valuable insights and solutions.
Common Furnace Problems
1. No Heat Produced
One of the most frustrating furnace problems is when it fails to produce heat. This can leave your home feeling cold and uncomfortable. There are several potential causes for this issue:
- Thermostat Malfunction: Ensure that your thermostat is set to the desired temperature and is functioning correctly.
- Pilot Light Out: If you have a gas furnace, check if the pilot light is on. If not, relight it according to the manufacturer's instructions.
- Ignition Problems: For furnaces with electronic ignition systems, check if there is a spark or if the igniter glows when the furnace should be heating up.
2. Insufficient Heat
If your furnace is producing some heat but not enough to adequately warm your home, consider the following possible causes:
- Clogged Air Filter: A dirty air filter can restrict airflow and reduce heating efficiency. Replace or clean the filter regularly.
- Leaky Ducts: Inspect your ductwork for leaks or gaps that may be causing heat loss. Seal any openings with duct tape or contact a professional HVAC contractor for assistance.
3. Frequent Cycling On and Off
A furnace that frequently turns on and off without reaching the desired temperature can indicate an underlying problem:
- Dirty Flame Sensor: The flame sensor is responsible for detecting the presence of a flame. If it is dirty or covered in debris, it may not function properly. Clean the sensor using a soft cloth or consult a heating contractor for assistance.
- Improperly Sized Furnace: A furnace that is too large for your home may cycle on and off frequently. Consider consulting an HVAC contractor to assess if your furnace is appropriately sized.
4. Unusual Noises
Strange noises coming from your furnace can be alarming. Here are some common noises and their potential causes:

Reliable HVAC Contractor for Comprehensive System Installation and Repair in Durham, CT - Rattling or Banging: Loose or broken components within the furnace could be causing these sounds. Check for loose screws or panels and tighten them if necessary. If the problem persists, contact a professional air conditioning contractor.
- Squealing or Screeching: These high-pitched noises often indicate a problem with the blower motor or fan belt. Lubricating the motor or replacing the belt may resolve the issue.
DIY Fixes
1. Regular Maintenance
Performing regular maintenance on your furnace can help prevent many common problems. Here are some essential maintenance tasks to keep in mind:
- Clean or Replace Air Filters: Dirty filters can restrict airflow and reduce efficiency. Clean or replace them every one to three months, depending on usage.
- Inspect and Clean Vents: Ensure that all vents are free of obstructions such as furniture, curtains, or dust buildup. Vacuum them regularly to remove any accumulated debris.
- Check Thermostat Batteries: Replace old batteries in your thermostat to ensure accurate temperature readings and proper functioning.
2. Check Gas Supply
If you have a gas furnace, ensure Thorough Ductwork Inspection and Repair for Better Indoor Air Quality in Durham that the gas supply is turned on and functioning correctly:
- Gas Valve Position: Check if the gas valve is in the "On" position. If not, turn it on according to the manufacturer's instructions.
- Gas Meter: Check the gas meter to ensure that there is an adequate supply of gas reaching your furnace. If you suspect a problem, contact your gas provider.
3. Clear Obstructions
Ensure that there are no obstructions blocking airflow to and from your furnace:

- Remove Debris: Clear any debris or objects that may be obstructing the intake and exhaust vents of your furnace. These obstructions can disrupt proper functioning and cause problems.
- Clear Space Around Furnace: Keep a clear space around your furnace, free of clutter or storage items. This allows for proper ventilation and prevents overheating.
4. Reset the System
Sometimes, a simple system reset can resolve minor issues with your furnace:
- Turn Off Power: Locate the power switch near your furnace and turn it off.
- Wait and Turn On: Wait for a few minutes before turning the power back on. This allows the system to reset.
- Test the Furnace: After resetting, test if the furnace is producing heat as desired. If not, further troubleshooting may be required.
Frequently Asked Questions (FAQs)
Q: What should I do if my furnace is not producing any heat? - A: First, check if your thermostat is set correctly and if the pilot light (for gas furnaces) is on. If these are in order, consult a professional furnace repair service for assistance.
Q: How often should I replace my furnace filters? - A: It is recommended to clean or replace your air filters every one to three months, depending on usage and filter type.
Q: Can I fix a leaking duct myself? - A: While some minor leaks can be sealed using duct tape, it is generally advisable to consult a professional HVAC contractor for proper duct sealing.
Q: Why does my furnace make a loud banging noise when it starts up? - A: A loose or broken component within the furnace could be causing this noise. Check for loose screws or panels and tighten them if necessary. If the problem persists, contact a professional air conditioning contractor.
Q: How can I prevent my furnace from frequently cycling on and off? - A: Regular maintenance, including cleaning the flame sensor and ensuring proper furnace sizing, can help prevent frequent cycling.
Q: Can I perform maintenance on my furnace myself? - A: While some basic maintenance tasks can be done by homeowners, it is recommended to have your furnace professionally serviced at least once a year to ensure optimal performance and safety.
Conclusion
By understanding the common problems that can affect furnaces and implementing DIY fixes, homeowners in Durham, CT can save Reliable Evaporator Coil Replacement Services in Durham for Improved Cooling time and money on repairs. However, it is important to know when to seek professional help if the issues persist or if you are unsure about performing certain tasks yourself. Regular maintenance and prompt troubleshooting can help keep your furnace running smoothly, ensuring your home remains warm and comfortable throughout the winter season. Remember to consult an experienced heating contractor or air conditioning contractor for any major repairs or concerns with your furnace.