Why Is My Furnace Leaking Water?

When the cold weather hits, your furnace becomes a necessity. A warm home keeps your family comfortable and cozy. However, sometimes your furnace can malfunction at the most inconvenient moments. A common issue with furnaces is seeing water around the unit. Usually, this reveals that something is either leaking, dripping or not draining properly. With different furnace units, there are different issues. Even though it’s common issue, you should never see water around your furnace unit–regardless of the type you have. Although sometimes the issue can be very minor and easily fixed, there are times where it’s a serious problem.


Condensation is usually the most common cause of water around a high-efficiency furnace. What’s the cause of condensation? It’s usually clogged condensation tubing or drains breaks in the condensation line and possible issues with the condensation pump if you have one.  Secondly, if you have a standard-efficiency furnace, which has a metal exhaust pipe, condensation should not be an issue. However, if condensation appears, it is usually because the flue pipe was sized incorrectly. This could cause the hot exhaust to cool down, thus condensing in the pipe, draining into the furnace and then leaking out.


With some units, there is a small device attached to a furnace which has various hookups for water, electricity, and drainage called the humidifier. A couple common issues with the humidifier include a clogged filter or drain which will cause the unit to leak. If this is left untreated, the leak could cause internal damage to your furnace unit– which can become costly to fix.

Secondary Heat Exchanger

A secondary heat exchanger’s purpose is to remove heat from the exhaust of the furnace.  If the secondary heat exchanger is faulty, this could be very costly to fix. Also if the problem is not solved then it may be time to replace your old furnace and install a new one.

Have you noticed water around your furnace unit? If so, don’t let it go untreated, it’s important to contact an HVAC contractor to provide furnace repairs, address and fix the issue. Contact the team at Admiral Air Conditioning and Heating today.

How Often Should You Replace Your Home Air Filter?

When it comes to changing your home’s air filter, or furnace filter, there is no rule or answer to this–although it’s important for your home’s air quality. There are a few factors to take into consideration when deciding to...

5 Most Common Furnace Issues

It’s that time of year again when the temperature drops at night in the Arizona desert, the air becomes crisp and you need to be warm as quick as possible. The last thing you want to happen is your furnace to stop working and you come home to...

How Often Should My Furnace be Inspected?

If you are like most people, you probably don’t give your furnace much thought until colder temperatures creep in. However, if your furnace is experiencing issues, this may mean that you have to go days – or longer – without...

How To Prepare Your Furnace For The Cooler Months

Before the cold winter days arrive, the best thing you can do is to make sure that the furnace is both safe and operational. When the first cold day comes, you do not want to turn on the furnace just to realize it is not working. Before winter sets...

Welcome to Our New Website!

We've added great new features and updated our content to bring you the most up to date information about our company.  Check back often for updates.

It's important to keep your unit in tip top shape for every season. Ask us about our maintenance program.
Bi-yearly checkups can guarantee to prolong the lifespan and efficiency of your air conditioning/heating unit.