[Kurious]

I had my gas furnace tuned. The tech removed a flexible tubing that looked like it had been hand made - it was bigger on one end than the other. It was hanging from one end but had apparently been attached. He put a yellow cap on the end that was dripping and said the water would flow down and end up in the same tube going to the condensation pump. In the closeup picture, the cap and point where the tube had been connected are marked in blue. In the full shot, the proposed drain path is marked in yellow. Does that make sense?

 

[diyorpay]

Where the big yellow cap is looks like it is connected to main PVC exhaust which pushes warm moist carbon monoxide up and to outdoors. When the furnace shuts off, moist gas that remained in the pipe turns to liquid and drips back down that pipe to a small elbow hose (now removed). No harm in removing plug and reconnecting a small hose to pump, to reduce path of exit that tech recommended.

Can't see where hose from induced draft fan is going.

I would get a better fitting air filter if the one in pic is jammed in.

 

[Kurious]

Thanks so much! How critical is it to get the tube installed. It's definitely something I could do but wouldn't be able to do it for a month. I'm also curious - the place the tube had been connected is open at this point. Is that the way it should be?

 

[diyorpay]

Check out some youtube videos.
Here's one where I grabbed some screenshots:

Notice yellow caps in 2 pics. Likely they are optional to allow different ways to install. Your tech noticed that the condensate pan is very rusted as is the floor.
He capped off where drips may be coming from.

Up to you to figure out if still dripping. If pump still goes on from time to time, condensate is draining properly.