Raise the p-setting, by default it is p-2. They typically say that in cold weather you need to lower the p setting to p-1 to compensate for the cold weather.. Nothing more than p-5. The p setting controls how long of a delay there is between the auger running and not running. My experience is that it can be very inconsistent.
What's already been said about the p-setting is right on target. Just curious though, what are you trying to smoke that 225 is too high for? Also, read the sticky about obsessing over pit temps. Spikes or dips of a few tens of degrees aren't really the problem that many make them out to be.
I can think of a few things right off the top. If you want to apply smoke at a lower temp to increase smoke flavor, or reverse searing steaks.
Then there's items you want to Hot-smoke such as sausage, ham or bacon... 225° would be too hot of a starting temp for smoking sausage (it would shock the fat).
Interesting. For my taste, and I usually like things really smoky, for tri-tip I usually just put the meat on the cold grill and the extra smoke you get during start up is plenty. 45 minutes or so total at like 350 to 375 usually gets me to a nice pink on the rare side of medium rare.
I copied this from something I read on another forum I belong to. Maybe this will help someone.
Smoke Setting Auger Timing
P-0 15 sec on 45 sec off
P-1 15 sec on 55 sec off
P-2 15 sec on 65 sec off
P-3 15 sec on 75 sec off
P-4 15 sec on 85 sec off
P-5 15 sec on 95 sec off
P-6 15 sec on 105 sec off
P-7 15 sec on 115 sec off
P-8 15 sec on 125 sec off
P-9 15 sec on 135 sec off
When you set the controller to a specific temp the auger runs continuously until that temp is reached. Then the controller goes into smoke mode based on the above table. When the grill's temperature drops 3 degrees below target temperture, the auger will run until the setpoint is again reached.
When the 225 controller reaches the set temp it starts the smoke mode with 15 sec on. That's why it has such large temp swings. Example P-2 on 15 sec - off 65 sec.
When the new 180 controller reaches the set temp it starts the smoke mode with the off setting. Example P-2 Off 65 sec - on 15 sec.