We get calls occasionally from worried customers who have noticed puddles of water around the furnace or heat pump in their home. There are several possible causes, most of which will require the help of a professional. There’s an outside chance that the cause is that a dirty furnace filter that has restricted the air flow enough to cause the evaporator coil to freeze up and create the water leakage you’re seeing. But that’s unlikely it will be that simple of a fix as just replacing the furnace filter. You can easily check the condition of your filter just to rule that option out before you call.
If you have a high-efficiency furnace, a more likely cause is that it’s from a clogged condensate trap in the floor drain, or a clog or break in in the condensation tube. Furnaces that have an AFUE rating of 90% or above have exhaust that is cool, which can create condensation. If you don’t have a yellow energy tag on your furnace that tells you what the AFUE is on your furnace, you’ll know it is above 90% AFUE if the vent pipe is white PVC plastic and not metal.
Another possible source of water around the furnace can be leakage from a whole-home humidifier that is installed in your furnace. This option will also require the assistance of a HVAC professional to locate the water leak. When you have a Preventative Maintenance Agreement with Star Heating and Cooling, we can check your humidifier as part of our regular clean and check and we can spot these problems before they become an issue.
Or, if you have a heat pump combined with air conditioning, the combined drain line could be clogged. The coils could have been frozen, which could be the source of the water.
If you live in Marion or Hamilton County in Central Indiana and you’re ready to call in the experts to diagnose and fix the cause of water around the furnace, you can contact Star Heating and Cooling at 317-753-0279.