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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:
Nov 9, 2018
All staff concerned were total professionals. Sales rep Dave was like having an old friend at your house. No up selling or pressure, just good honest facts and figures. The owners and assistant who installed our unit worked quietly, efficiently and left our home clean. We could not have been happier with the service and attention we were given. We are so happy a family member recommended Twintech. She said "don't call anyone else, just call them...they are amazing". And they were!!! Thank you guys for the great work!!! A. Johnson
Oct 28, 2018
We are completing a large project adding an addition on to our house and couldnt be more pleased with our decision to trust Twintech with our hvac work. They removed and replaced the furnace, installed a new A/C unit, swapped our tank water heater for a tankless unit, and completed ducting and new A/C lines through the addition. Without hesitation we would recommend Twintech to anyone.
Sep 6, 2018
Honest, very personable , men of their word ,workmanship xcellent ,showed up when promised ,They do not try to up sell ,rather give good advice instead . Price was very fair in my opinion .We have a family member with a medical condition and I think they made us a priority .Very happy with these guys . (Nice guys ) Stu Leffler Ajax.
Sep 5, 2018
Very professional, courteous, knowledgeable staff. Sales staff (David Gergley) excellent in knowledge and getting the job setup and installation was very prompt. Greg and Peter (technicians) knew their stuff and stuck around after completion to make sure it all worked properly and that I understood how it all was installed and how the unit worked. Would highly recommend them! Thanks for a great job-house is now cool and comfortable.
Sep 4, 2018
I had Twintech install a brand new air condition back in June of this year and I'm very happy with their service. I have a very busy schedule so I sent out an email to 7 or 8 HVAC companies just to get an idea of what it would cost. Dave at Twintech and only one other company were able to give me an approximate quote through email. Many of the companies I reached out to didn't even respond. I decided to meet with Dave and he was very friendly and professional. He gave me a good quote for a name brand/energy efficient AC with installation from their certified technicians. It was an easy decision to go with them.
Within a week I had the unit installed and working perfectly. Their technicians were very helpful and answered all of my questions. I'll definitely be calling them back for all of my HVAC needs in the future.
Oct 9, 2018
The people from Twintech were very friendly and personable...from the salesman to the installers. The installation was done as scheduled. I love my new air conditioner. My neighbour has a York and that thing is so noisy compared to my Goodman!! Thanks Twintech!!
Sep 5, 2018
Thank you, Twintech. They installed an A/C in my home in the middle of a heat wave which we appreciated very much. I found the team good, not overly friendly, other than the brothers. Dave, the salesperson was awesome, and, it's because of him that I was sold on using Twintech. I had other questions about additional work I am curious about and would have liked them to follow up and provide a quote. Other than that, which ultimately is not related to the great work they did, I would definitely recommend them, although I don't believe they go outside of Durham (check with them).
Aug 4, 2018
We have used this company a few times so I can't remember exactly what we paid but I do know that their fees are always very reasonable.
The first time we called Greg was when our furnace conked out while we were away. He came right away, showed me the problem and fixed it immediately.
The second time was when we needed an air conditioner moved and lifted to a platform. Again, he showed up on time, completed the job quickly (including a new gas line) and the fee was very reasonable.
We have received a quote from Greg to replace the air conditioner and furnace and when we are ready to move ahead, we will be calling him.
I have no hesitation in recommending TwinTech!
Jul 19, 2018
Our rating for Twintech is 5/5 stars. They are very professional and efficient, and the transparency they maintain right from the preliminary assessment till the day of the work is a testament to their experience in the field. We had Twintech replace our air conditioning and furnace, and we appreciate the efforts taken by Greg.
Apr 30, 2018
After 18 years my Air conditioner died in the middle of a heat wave. I entered my information on Home Stars and within the hour Dave from Twin Tech responded and offered to meet me as soon as possible depending on my availability. Dave was very knowledgeable about the products Twin Tech offered and even though this was the first quote I received . I felt very comfortable in giving Twin Tech my business. maybe it was the professional approach. Needless to say that the crew with Greg and Grant arrived promptly at the time they committed to were very professional and within a few hours had the place cool. They cleaned up and one would never know that I had work done . I know that the System is new and I probably wont need to worry about it for some time. However with the professionalism displayed by the crew I feel assured that should I need to call for service Twin Tech will respond. I also know that should I need a new Heating system I will go with Twin Tech. Keep up the good work.
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