Building an air conditioning drain pan overflow
Before reading this guide, please consider our FLT601, the ready-made
solution we offer at our parent company website:
AquaGuard AG-100+. The AquaGuard
condensate sensor is a great ready-made solution for this issue.
The AG-1100+ is the replacement for the AG-1100. It is a great
condensate float switch for air conditioning drain pans.
Do you have an air conditioning system in a place
where condensate cannot run to a floor drain? Are you sure that
the condensate catch pan for your air conditioning can readily drain to
If your A/C drain pan becomes full of condensate and
the water cannot escape, it could overflow the catch pan and damage your
floor and/or the ceiling of the next level down in your home or office.
If you do not already have a float switch that can alert you to a
possible overflow, the following text describes an easy and inexpensive
fix for this problem, using our i-float float switch, 9V Battery Snap,
Buzzer and a 9V battery - all of these can be purchased in our
auto top-off components area or at the
bottom of this page.
Alert system assembly steps
1. Our i-float float switches are delivered to you in
a "normally closed" state. For this application, we want the
switch to complete a circuit when the float rises, so we need the switch
to be "normally open." Simply remove the bottom clip from
underneath the float, remove the float, turn it upside down, replace the
float on the stem and re-attach the bottom clip. Now the float
switch will turn on the buzzer when water causes the float to rise.
2. Strip the ends from the float switch, buzzer and
battery clip wires. Twist connect one float switch wire to the
black lead from the battery snap and the other to the black lead from
the buzzer. Then twist connect the two remaining red wires, as
shown below. Use wire caps on all of the connections (only one
connection is shown capped below so that you can see the wire
3. Attach the battery and gently lift the float on
the float switch to test the system. The buzzer will sound. NEVER USE A
RECHARGEABLE BATTERY IN THIS OR ANY APPLICATION WHERE IT COULD GET WET.
RECHARGEABLE BATTERIES CAN EXPLODE IF SHORTED.
4. Use our Mold-a-Holder product to create a
mount for the float switch and a small platform to keep the buzzer and battery
away from what could be a wet floor. The photo below shows an
example. Mold-a-Holder is flexible and very easy to work with.
Mold-a-Holder instructions. Make a mount that is suitable
for your pan and situation. Just keep the battery up off the
A good alkaline battery will operate the buzzer for 3
to 8 hours. Replace your battery every 6-12 months or whenever
your alarm sounds for more than a few minutes.