[Alfie2]

My 24 week puppy was doing so good at potty training for the last 6 weeks, which made me feel real good, however in the last 3 days he has peed once every evening in the house, which is so discouraging. Not sure what I have done wrong, it is not even that it was his time to go out as I take him out every 3 hours.

 

[Crantastic]

Regression is common in training! He's still young. Just keep up with the routine, taking him out on a schedule and if he's just eaten/drank or run around playing. Don't give him the opportunity to pee inside. When you can't be watching him to interrupt and rush him outside, crate him. He'll get back on track, don't worry.

 

[Alfie2]

Thank you, I will keep trying ...

 

[storyist]

I'd cut that 3 hours back to 2 or even 1 until he's mistake free again for several weeks. Then start slowly stretching intervals back out.

 

[arya_lee]

Learn the signs of needing to go
Your new puppy might not speak the same language, but he's trying to tell you that he needs to eliminate. Luckily there are certain signs for which you can keep a lookout. Immediately bring your dog outside to his special potty spot when you see him:

• Smelling his rear
• Pacing in circles
• Barking or scratching at the door
• Sniffing the floor
• Squatting.

He may show the last sign a bit too late, but be ready to open the door anyways so he will know that his usual area is up for grabs before he goes in the wrong place.
You'll need to quickly bring your dog outside when you see any of these signs, so plan ahead. Keep a leash right at the door, allowing you to usher him outside as quickly as possible. And once he learns where his special potty area is, he'll return to it all on his own. Just don't forget to choose the same spot every time your dog needs to relieve himself.

I have read this in one of the dog articles and I think it applies in your case too.