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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:
Jan 1, 2015
Dave was great in helping me get the proper units for my property, as well as getting them installed. The installers arrived when they said they would, and completed the project on time, and professionally. If I needed another furnace, I would use Dave again.
Jan 1, 2015
I have known Greg and Grant Dainty for many years and have used their company for my house and business. I recommended them also for my parents and sister and they all have been very satisfied with the quality of work for a reasonable price. I just recently had them install a new HVAC system in an older house and was very pleased with their work. Craig in Pickering. After meeting with various heating and air conditioning contractors I was referred to Twin Tech Heating and Cooling through a family member. Greg and Grant arrived at my home and provided me with an estimate and a plan as to how they were going to remove and replace my furnace and air conditioner. On the day of install Greg and Grant arrived at my home on time and were very professional and extremely courteous as to any questions or concerns that I had. The removal and install was truly professional and the attention to detail was exactly what I was looking for. Ive seen many installs from other contractors and I couldnt be any happier to have had such a clean looking install. The sheet metal work, ducting and venting all look fantastic. Upon completion Greg and Grant left me feeling extremely happy and very fortunate of a job well done. Thanks again Twin Tech!!
Jan 1, 2015
My old furnace had finally broken down for the last time when contacted twintech to have a new furnace installed They were prompt, knowledgeable and very reasonably priced. They did such a great job i tell all my friends and family about this company.
Jan 1, 2015
To whom it may concern, I recently had TwinTech (Greg and Grant Dainty) replace my furnace and service both my gas fireplaces and air conditioning unit. They were professional, courteous and very fair in their pricing. I would gladly recommend TwinTech to anyone needing work done. I can be contacted at 905-626-XXXX.
Jan 1, 2015
My Fiancé and I have relied on Twintech Heating and Cooling now for the better part of the last 10 years. In that time, Greg has installed a furnace, an air conditioner, and a heat-pump at our residence in Toronto. In each instance Greg and his team were a pleasure to deal with. They were courteous and professional throughout the whole process and the quality of their work is first rate. Our experiences have always been extremely positive and we have referred his services numerous times to our friends and family. Without hesitation, I would recommend Greg and TwinTech Heating and Cooling to anyone looking to service or replace their existing heat/AC equipment
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