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Is My Furnace Producing No Heat?
Posted On: December 6, 2024
If your furnace is not producing heat, it could be due to several potential issues. Here's a guide to troubleshoot the problem:
1. Check the Thermostat
- Ensure the thermostat is set to "Heat" and the temperature is higher than the current room temperature.
- Check if the thermostat has power (replace batteries if needed).
2. Inspect the Power Supply
- Make sure the furnace is receiving power. Check the circuit breaker or fuse box for tripped breakers or blown fuses.
- Some furnaces have a power switch; confirm it is turned on.
3. Pilot Light or Ignition System
- For older furnaces with a pilot light, ensure the pilot is lit. If it’s out, follow the manufacturer’s instructions to relight it.
- For modern furnaces, check the electronic ignition system for errors.
4. Dirty Air Filter
- A clogged air filter can restrict airflow, causing the furnace to overheat and shut down. Replace the filter if it's dirty.
5. Gas Supply Issues
- If your furnace is gas-powered, make sure the gas valve is open. Check with your gas provider to confirm there are no service interruptions.
6. Blower Motor or Belt Problems
- If you hear the furnace running but no air is blowing, the blower motor or its belt could be faulty.
7. Clogged Condensate Line
- High-efficiency furnaces may shut down if the condensate drain line is clogged.
8. Faulty Limit Switch
- The limit switch may prevent the furnace from producing heat if it detects overheating. This requires professional servicing.
9. Dirty or Malfunctioning Burners
- Inspect burners for dirt or corrosion that could prevent proper ignition.
10. Call a Professional
- If none of the above resolves the issue, it’s best to contact a licensed HVAC technician to diagnose and fix the problem safely.
Keeping up with regular maintenance can help prevent heating issues and ensure your furnace operates efficiently.
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See What Our Customers Are Saying:
May 3, 2020
Reasonable price and the workmanship was prompt and timely and the employees were great to deal with.
May 2, 2020
The sales process was friendly, informative, and very consultative. They worked hard to earn our business by taking a careful look around our home to assess our needs, providing a lot of information about the product, and answering all our questions and finding the right solution for our home at a competitive price. They prepared us very well for what to expect on installation day, and the installation went very smoothly - no surprises, all very professional! They gave us a call after installation to ensure we were happy with the work. We're very happy that we chose to work with TwinTech to get our new furnace.
May 1, 2020
Twintech promptly responded to request for quotation. They were thorough and helpful in explaining options. The quote was very competitive. Installation of new furnace was very professionally completed. Excellent work.
Jan 17, 2020
When our old oil furnace finally broke down we decided it was time to finally convert to natural gas and finally install central air conditioning at the same time. Knowing it was going to be a significant investment for us, we wanted to make the right choice. Twintech came highly recommended by a friend and we were not disappointed. From the first contact with the salesperson, until the final touches on the installation, we were so pleased with their service. Everyone from the company was so friendly, efficient and a pleasure to deal with. Best of all, the cost was very competitive. We would certainly recommend Twintech to anyone requiring HVAC work in their home.
Jan 15, 2020
Mitch from Twintech came out for our annual furnace inspection. We found him to be friendly, conscientious & he left the work area clean. We were also very impressed with the thoroughness of the job he did. This is the 2nd job weve had Twintech do for us & have been very happy with the results for each. We highly recommend this company. Thank you, Mitch, Dave & Greg.
Jan 14, 2020
Work was done on schedule, professionally, according to quote and with minimal inconvenience to building users. Very happy with the end result. The only area for improvement from my experience - need more timely quoting process.
Jan 13, 2020
The team was great! Very knowledgeable, professional and extremely helpful. A few days after install the unit didnt seem to be working, user error, but within minutes of contacting them..on a Saturday.. a tech was on the phone troubleshooting with us. I highly recommend Twintech for your cooling or heating needs. They stand by their products and a pleasure to deal with.
Jan 11, 2020
During the hottest week in the summer our old A/C decided to call it quits. I called Twintech Heating & Cooling after receiving a referral from a family member; came highly rated for being an honest, family-run business, who appreciates their customers. Dave was able to accommodate my hectic schedule and book a late evening appointment to walk through the specifics. Greg and Mitch arrived exactly on time a few days later, were very polite and friendly, and within a couple of hours had a new unit up and running. I also received a follow-up call to ensure we were happy with the Amana.
Jan 10, 2020
They were on time and very professional. I'm so glad I decided to go with Twintech, thanks!
Aug 20, 2019
Timely and appreciated - this was during the hottest days this year when our Air and Furnace way.
Efficient. Professional. No BS or overselling. What was promised, was delivered at a cost-effective price point.
Down to earth.
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