Furnace Repair Brampton

Causes of Water Leaking from Furnace When Heat is On

causes of water leaking from furnace when heat is on

The furnace blends multifaceted mechanical and technical components, which are prone to get damaged with the slightest of provocation. Some furnace problems  could be significant and demanding, while others are small. You don’t want to neglect what causes of water leaking from furnace when heat is on.

So many things can go wrong when the furnace starts leaking, and you wouldn’t want to be a victim of the risky outcome.

Related: Why Does My Furnace Keep Shutting Off

Why Does My Furnace Leak When in Use?

A furnace doesn’t leak for the sake of it. It leaks when something bigger problem is wrong. The following are some of the main reasons your furnace may start leaking when you turn the heat on.

Condensation issue

If your furnace leaks, it’s probably an issue with condensation. Modern high-efficiency furnaces operate at high efficient levels, thanks to the dual heat exchangers. As the heat exchangers heat and release condensation, which is transferred to your home through floor drains and pipes, many can happen along the way.

In some instances, the lines can break or get clogged, leading to condensation leaking at the bottom of the furnace. With time, the condensed hot air will build up to form water drops, which could damage your furnace.

Heat Exchanger issue

If it’s not a condensation leakage, it could be a heat exchanger leak. Leaking heat exchangers are complex to deal with, and in most instances, you will pay a lot of money on repairs. In many cases, professionals will recommend buying a new heat exchanger. That’s because repairing a damaged heat exchanger can prove impossible even to the most skilled HVAC technician.

Leaks in the humidifier

If the two reasons above aren’t why your furnace is leaking, it could then be a problem with the humidifier. Humidifier leaks happen mostly when the humidifier is clogged or broken. 

Since humidifiers connect to your plumbing system purposely to provide moisture to the air flowing into your spaces, if they are clogged or damaged, the air will be released to exterior parts. In many instances, it collects around the furnace in the form of water droplets.

Leakages in the air conditioner

When your HVAC technician has checked all the above components and doesn’t diagnose the source of the leakage, they will likely examine the air conditioner.

If the air conditioner and furnace are running simultaneously, it’s possible that the water drops accumulated around the condensation pan will drip onto the surface of your furnace. While it may not be a furnace leak, the water droppings could directly affect your furnace’s performance.

Leakage in the plumbing system

Furnace leaks could also signify a problem with your plumbing system. When the leakage is coming from your plumbing system, it simply means the furnace components are intact. However, that doesn’t mean that you should ignore the leakage because you might expose the furnace to dozens of potential problems if you do.

The air filters have a clogging

The last most likely reason your furnace will leak is when the air filters are clogged. Clogged air filters block the smooth flow of air to the furnace coil. If that happens, the likely result will be freezing of the coil. In other instances, dirty and clogged air filters will cause the leakage of water, which may collect around your heating system.

How Do I Stop My Furnace From Leaking?

New Furnace Cost - Gas Furnace Replacement vs. Repair 2017 ...

Water leaks from your furnace aren’t an issue you want to disregard as unnecessary. Neglecting water leakages can have a profound long-term impact on your heating system. Make sure the water leak is addressed immediately after the discovery. Before you call the HVAC technician, here are things you should do to salvage the situation:

  1. Right after discovering water coming from your furnace or accumulating around the heating system, take the bold step to power it off. Switch the system off, and then go ahead to turn the main switch off. If you can’t do any of the above, turning the heating system off right from your home’s fuse box is better.
  2. Convinced that the furnace is off, clean the accumulated water from your heating system. Stagnant water flooding around your furnace system can damage the unit.
  3. If you aren’t busy, inspect and clean the air filters. Unclog any clogged air filters and make sure you leave them clean. You can use a water-safe vacuum to extract anything clogging the filters.
  4. Put on the heating system. If you don’t detect any leaks after igniting the heating system, the problem may come from clogged filters. However, if the furnace still leaks, you want to call your furnace repair for quick solutions.

What You Shouldn’t Do When Your Furnace is Leaking

Leaks from your heating system aren’t something you would want to gamble with. As you’ve seen above, most leakages result from complex problems within your furnace components. If you have a furnace leak, you should never try dismantling the furnace to do the repairs yourself. You’re more likely to leave the furnace damaged further, which could add to the overall repair costs.

Second, you should never try cleaning the water around the furnace before you put it off. There are chances you might get electrocuted in the process.

Third, you should never assume that the furnace will be fine and fail to call your HVAC technician. Leaving the furnace leaks unattended for hours or days could leave the unit with severe and costly damages.

Water Leaking from Furnace When Heat is On – Conclusion

Furnace leaks don’t always happen, so it’s better to look for the right features when buying a new furnace. If they do happen, it’s an indication of a problem inside the furnace. There are several reasons that they occur, some minor, others major.

If you discover leaking water in your furnace, you don’t want to try handling the leaks yourself, as that could expose you to multiple health risks. You must neither neglect the leakage as it could develop into a more significant issue. The right thing you ought to do is call your HVAC repair technician to resolve the leakage issue.