October 2, 2023


My Sweet Home

Learn how to Repair a Clogged Furnace Condensate Drain Line.

7 min read

🔥 Learn how to Repair a Clogged Furnace Condensate Drain Line.

You probably have a high-efficiency gasoline furnace and it gained’t run, one of many causes might be a clogged drain line.

If you happen to’re undecided, the easy technique to examine is to search for a bit of clear ‘Sight Glass‘ and to depend what number of instances the pink mild flashes.

There might be a flash code record on both the entrance or again of the furnace entry door.

If the code for the variety of flashes you counted is one thing associated to a stress swap or the condensate drain line, then you definately may need a clogged condensate drain.

🔥 Learn how to Unclog Your Furnace’s Condensate Drain

Condensate Drain Line

There are a number of methods to unclog the drain line, however how straightforward it’s will rely upon how effectively the furnace was put in.

If it was put in with upkeep in thoughts, then a detachable p-trap or drain entice needs to be put in; if there may be, then merely take away it, and rinse it out in your sink.

Make sure that to re-fill it with clear water previous to placing it again in.

If it’s not detachable, or there isn’t a drain entice put in, then your job simply received a bit of harder.

Some instruments you would possibly be capable to use to unclog your furnace condensate drain.

🔥 Learn how to use Completely different Instruments to Unclog Your Condensate Line:

Furnace condensate drain line
  • Drain snake – utilizing a versatile wire brush by pushing it up or down the condensate entice cannot solely clear the blockage but in addition clear the within of the condensate line, decreasing the possibilities of future blockages. You should buy versatile drain brushes which can be over 5 ft lengthy. If that’s not lengthy sufficient, you’ll have to search for one other resolution to your clogged condensate drain tube.
  • CO2 gun – it is a tool that HVAC technicians use to blow out the drain line rapidly. It’s a fast repair and gained’t cease future blockages. After blowing out the drain line, you’d need to clear it with white vinegar or scorching water and cleaning soap.
  • Moist and Dry Vacuum – utilizing a moist and dry vacuum to unclog a furnace condensate drain line requires a bit of ingenuity, as you’ll have to seal the suction finish of the vacuum across the condensate line in order that it’s air-tight. The moist and dry vacuum will clear blockages midway up the drain line if finished correctly.
  • PVC cutter or hack noticed – these instruments might be used to take away the condensate line so you’ll be able to work on it extra simply.
  • PVC glue, PVC pipe, and a PVC coupling (often 3/4″) – these supplies might be wanted to place condensate drains again collectively.

Earlier than we get began, let’s find out about why condensate drain strains get plugged within the first place.

🔥 Why Does a Condensate Line Get Clogged In The First Place?

When a high-efficiency gasoline furnace burns gasoline, it creates acidic condensation that may trigger slime and rust to construct up within the condensate p-trap.

There’s nothing you are able to do about this aside from to make sure the furnace is working as designed by having it checked out yearly by an skilled HVAC technician.

🔥 What’s a Condensate Pump Float Swap For?

A condensate pump float swap is for stopping the furnace from working when there is a matter with the condensate pump that stops it from safely pumping the condensation to a drain line.

In case your furnace isn’t working and your condensate pump is full, you would possibly want a brand new one.

🔥 What’s a Condensate Drain Pan For?

AC condensate drain line

A condensate drain pan is used as a backup for when the first drain pan or condensate line will get blocked or plugged.

If this occurs, the first drain pan might overflow and leak into the secondary condensate drain pan.

This drain pan could have its devoted drain line.

🔥 Why Does a Excessive-Effectivity Furnace Make Condensate?

A excessive environment friendly furnace makes condensate as a result of it burns such a excessive share of gasoline that a lot of the exhaust is water vapor.

The exhaust cools down due to the effectiveness of the warmth exchanger, and when that exhaust is available in contact with the cooler PVC exhaust tubes, it condenses into water droplets.

The furnace venting is designed to slope again to the furnace in order that the water droplets could make their manner again to the drain line and ultimately to the house’s plumbing drains.

If a high-efficient furnace isn’t arrange correctly upon set up, then the combustion course of will be affected to a degree the place flue gases touring by the exhaust system can create extra moisture.

That is often attributable to improper gasoline pressures.

One other adverse facet impact of improper gasoline pressures or extra moisture is untimely rusting and warmth exchanger failure.

🔥 The place Can I Drain My Condensate Line?

Most houses can drain their condensate line to the ground drain, however in the event you’re on a septic system, then the reply is a bit more sophisticated.

When a furnace burns a gasoline, the condensation is technically clear. Nevertheless, the PH is often between 2.9 and 4, which makes it acidic.

This will trigger harm to pipes, septic techniques, water remedy amenities, and extra.

In an effort to safely drain furnace condensate, you need to have a condensate neutralizer put in.

The condensate water travels by the neutralizer, which incorporates calcium carbonate, CO2, and salt, which neutralizes the acid and makes the condensate secure on your septic system.

🔥 Different Signs of Furnace or AC Condensate Drain Points

🔧 Water Harm

You probably have a clogged condensate line or a condensate pan overflows, it’s possible you’ll discover water on the ground round your HVAC system, water stains on close by partitions, or if the HVAC system is put in within the attic, then you definately may need water stains on the ceiling.

🔧 Musty Smells or Odors in Your House

Condensate drainage points along with your HVAC system result in extra moisture in your house.

As this extra moisture stagnates in your HVAC system, the odors journey by your ductwork and flow into all through your own home.

If you happen to’re noticing musty or moldy odors in your house, the primary place to examine is your HVAC system.

🔧 Extra Condensation Indoors or on Home windows

If it’s not raining exterior, you haven’t turned up your humidifier, and you continue to have condensation across the edges of your home windows, you may need an issue along with your furnace or air conditioner condensate drain line.

Examine the drain line popping out of the AC evaporator coil and the drain line popping out of the furnace.

🔧 Increased Power Payments

This principally pertains to the summer time as an air conditioner dehumidifies, so in case your drain line isn’t working correctly, your AC should work more durable to chill the home.

In case your utility payments are larger than regular, you need to examine to make sure there aren’t any indicators of a condensate drainage subject.

🔧 Poor Indoor Air High quality

Does it really feel muggy or chilly and clammy in your house?

Are you discovering your allergic reactions to be worse than ordinary?

Then excessive humidity ranges attributable to drain line points might be the trigger.

Examine your system for the indicators talked about on this article, or name an skilled HVAC technician for assist.

🔧 Mildew Progress Inside Your House

Mildew thrives in heat and humid climates and might initially be seen across the furnace.

If left unchecked, mildew will unfold all through the house and might trigger important well being points for you and your loved ones.

To make sure that problematic HVAC drains aren’t your subject, you need to have an HVAC contractor carry out annual upkeep in your HVAC tools.

🔥Ultimate Ideas on Clogged Condensate Drain Strains

Phyxter Approved Logo on Service Truck

Hopefully, this text has helped you to find out whether or not you’ve got a clogged drain line or learn how to unplug it.

If you happen to can’t repair your subject or usually are not snug doing this your self, then we advocate contacting a highly-rated HVAC contractor in your space.

If you happen to discovered this useful however didn’t clear up your downside, you’ll be able to take a look at a few of our different furnace restore articles.

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