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What to Do When Your Furnace Starts Leaking
Posted On: January 23, 2025
A leaking furnace can be a concerning issue, but addressing it promptly can help prevent further damage to your home or HVAC system. Here’s what to do if your furnace starts leaking:
1. Turn Off the Furnace
- Safety First: Shut off the furnace to avoid electrical hazards or additional damage.
- Locate the power switch near the furnace or turn it off at the circuit breaker.
2. Check the Source of the Leak
- Condensation Issues: Modern high-efficiency furnaces (with an AFUE rating of 90% or higher) produce condensation. If the drainage system for this condensation is clogged or broken, it can lead to leaks.
- Humidifier Leak: If your furnace is equipped with a built-in humidifier, it could be the source of the leak if there's a clog or crack in the water line.
- Internal Components: Older furnaces or mid-efficiency models that don’t produce condensation may have issues like leaking heat exchangers.
3. Inspect the Drain Lines and Pan
- Check the condensate drain line for clogs or cracks. Over time, debris can block the line, causing water to back up and leak.
- Examine the drain pan beneath the furnace. If it’s cracked or full, it could be the cause of the leak.
4. Clear Any Clogs
- Use a wet/dry vacuum or a thin wire to clear out any blockages in the condensate drain line.
- Clean the drain pan and ensure it’s properly positioned.
5. Tighten Connections
- If the issue is related to loose hoses or pipes in the furnace, tighten the connections securely to stop the leakage.
6. Address the Humidifier
- Inspect the humidifier water lines for cracks or blockages and replace damaged components if necessary.
7. Call a Professional
- If you cannot determine the source of the leak, or if the issue persists, contact an HVAC technician to assess and repair the problem. Delaying professional help can lead to more costly repairs or damage to your home.
8. Prevent Future Leaks
- Regular Maintenance: Schedule annual furnace inspections and tune-ups to ensure everything is functioning properly.
- Keep Drain Lines Clear: Periodically clean and inspect the condensate line and pan to prevent buildup.
- Replace Air Filters: Dirty filters can reduce airflow, causing condensation to accumulate where it shouldn’t.
By addressing the leak early, you can avoid potential damage and ensure your furnace continues operating 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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