Replacing defrost board

HVAC GUY
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Oct 28, 2026
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Replacing defrost board.
Recognize this one from yesterday.
I had to come back out because
Because.
the noise it was making was because it was freezing up.
All right.
So I diagnosed this board,
this defrost control board, this morning.
That's what we're going to
do. We're going
to replace this board.
I have already killed
the power, so let's get started
on this. Just
making sure. Now
this board here
has sensors
on it that are
not removable.
And this one, you've got to put them on.
So if this is getting 24 volts in the right column,
it's not going through defrost, you can just replace the board.
All right, these are my two sensors, so I'm just going to cut them off.
There's one of them right there, we're going
through
that,
so I'm
going
to see
if I
can
get
you
where
you
can
see.
I can't see for the sun.
Actually,
I'm going to move that to
a better spot up here.
So this is what I was trying to get to right here.
That's a good spot.
Now my other sensor also goes through here.
Oh, just
zip tie
right
there.
I have
lost
my little,
I've lost
that
little.
There it is.
