I’ve downloaded the latest image and flashed it to an MicroSD
When I power on the Pi the official active cooler spins for about a minute but then stops and doesn’t start again.
I can manually start it with \echo 255 | sudo tee /sys/class/hwmon/hwmon*/pwm1 so I know it’s detected.
I’ve seen this issue Pi5, original active cooler is not run after startup · Issue #7386 · MichaIng/DietPi · GitHub but that seems to be a kernal issue when going from a pi 4 to pi 5 I’m starting from scratch.
I did a stress test and saw the temp go up to 60 but I still didn’t see the fan spin.
I just did a test with a new image and the active cooler works as expected. Fan speed increases at 60°C
Stress Test
─────────────────────────────────────────────────────
Mode: Running stress test for 300 seconds
[ INFO ] DietPi-Config | To terminate, type: killall stress
stress: info: [2960] dispatching hogs: 8 cpu, 0 io, 0 vm, 0 hdd
Sun Mar 23 11:17:47 CET 2025 | 47 °C | 300 seconds remaining | Fan Speed: 3098 RPM
Sun Mar 23 11:17:48 CET 2025 | 51 °C | 299 seconds remaining | Fan Speed: 3072 RPM
Sun Mar 23 11:17:49 CET 2025 | 52 °C | 298 seconds remaining | Fan Speed: 3080 RPM
Sun Mar 23 11:17:50 CET 2025 | 54 °C | 297 seconds remaining | Fan Speed: 3079 RPM
Sun Mar 23 11:17:51 CET 2025 | 54 °C | 296 seconds remaining | Fan Speed: 3070 RPM
Sun Mar 23 11:17:53 CET 2025 | 54 °C | 294 seconds remaining | Fan Speed: 3082 RPM
Sun Mar 23 11:17:54 CET 2025 | 55 °C | 293 seconds remaining | Fan Speed: 3079 RPM
Sun Mar 23 11:17:55 CET 2025 | 56 °C | 292 seconds remaining | Fan Speed: 3074 RPM
Sun Mar 23 11:17:56 CET 2025 | 55 °C | 291 seconds remaining | Fan Speed: 3082 RPM
Sun Mar 23 11:17:57 CET 2025 | 55 °C | 290 seconds remaining | Fan Speed: 3078 RPM
Sun Mar 23 11:17:58 CET 2025 | 57 °C | 289 seconds remaining | Fan Speed: 3079 RPM
Sun Mar 23 11:17:59 CET 2025 | 55 °C | 288 seconds remaining | Fan Speed: 3080 RPM
Sun Mar 23 11:18:00 CET 2025 | 55 °C | 287 seconds remaining | Fan Speed: 3080 RPM
Sun Mar 23 11:18:01 CET 2025 | 55 °C | 286 seconds remaining | Fan Speed: 3073 RPM
Sun Mar 23 11:18:02 CET 2025 | 56 °C | 285 seconds remaining | Fan Speed: 3076 RPM
Sun Mar 23 11:18:03 CET 2025 | 56 °C | 284 seconds remaining | Fan Speed: 3081 RPM
Sun Mar 23 11:18:04 CET 2025 | 57 °C | 283 seconds remaining | Fan Speed: 3088 RPM
Sun Mar 23 11:18:05 CET 2025 | 56 °C | 282 seconds remaining | Fan Speed: 3083 RPM
Sun Mar 23 11:18:06 CET 2025 | 57 °C | 281 seconds remaining | Fan Speed: 3079 RPM
Sun Mar 23 11:18:07 CET 2025 | 58 °C | 280 seconds remaining | Fan Speed: 3084 RPM
Sun Mar 23 11:18:08 CET 2025 | 56 °C | 279 seconds remaining | Fan Speed: 3084 RPM
Sun Mar 23 11:18:09 CET 2025 | 58 °C | 278 seconds remaining | Fan Speed: 3081 RPM
Sun Mar 23 11:18:10 CET 2025 | 57 °C | 277 seconds remaining | Fan Speed: 3082 RPM
Sun Mar 23 11:18:11 CET 2025 | 58 °C | 276 seconds remaining | Fan Speed: 3088 RPM
Sun Mar 23 11:18:12 CET 2025 | 57 °C | 275 seconds remaining | Fan Speed: 3089 RPM
Sun Mar 23 11:18:14 CET 2025 | 58 °C | 273 seconds remaining | Fan Speed: 3090 RPM
Sun Mar 23 11:18:15 CET 2025 | 57 °C | 272 seconds remaining | Fan Speed: 3092 RPM
Sun Mar 23 11:18:16 CET 2025 | 58 °C | 271 seconds remaining | Fan Speed: 3093 RPM
Sun Mar 23 11:18:17 CET 2025 | 57 °C | 270 seconds remaining | Fan Speed: 3090 RPM
Sun Mar 23 11:18:18 CET 2025 | 59 °C | 269 seconds remaining | Fan Speed: 3088 RPM
Sun Mar 23 11:18:19 CET 2025 | 59 °C | 268 seconds remaining | Fan Speed: 3092 RPM
Sun Mar 23 11:18:20 CET 2025 | 59 °C | 267 seconds remaining | Fan Speed: 3094 RPM
Sun Mar 23 11:18:21 CET 2025 | 59 °C | 266 seconds remaining | Fan Speed: 3095 RPM
Sun Mar 23 11:18:22 CET 2025 | 58 °C | 265 seconds remaining | Fan Speed: 3095 RPM
Sun Mar 23 11:18:23 CET 2025 | 60 °C | 264 seconds remaining | Fan Speed: 3102 RPM
Sun Mar 23 11:18:24 CET 2025 | 58 °C | 263 seconds remaining | Fan Speed: 3100 RPM
Sun Mar 23 11:18:25 CET 2025 | 58 °C | 262 seconds remaining | Fan Speed: 3100 RPM
Sun Mar 23 11:18:26 CET 2025 | 58 °C | 261 seconds remaining | Fan Speed: 3107 RPM
Sun Mar 23 11:18:27 CET 2025 | 58 °C | 260 seconds remaining | Fan Speed: 3108 RPM
Sun Mar 23 11:18:28 CET 2025 | 60 °C | 259 seconds remaining | Fan Speed: 4945 RPM
Sun Mar 23 11:18:29 CET 2025 | 60 °C | 258 seconds remaining | Fan Speed: 5026 RPM
Sun Mar 23 11:18:30 CET 2025 | 60 °C | 257 seconds remaining | Fan Speed: 5019 RPM
Sun Mar 23 11:18:31 CET 2025 | 60 °C | 256 seconds remaining | Fan Speed: 5025 RPM
Sun Mar 23 11:18:32 CET 2025 | 58 °C | 255 seconds remaining | Fan Speed: 5041 RPM
Sun Mar 23 11:18:33 CET 2025 | 58 °C | 254 seconds remaining | Fan Speed: 5040 RPM
Sun Mar 23 11:18:34 CET 2025 | 59 °C | 253 seconds remaining | Fan Speed: 5056 RPM
Sun Mar 23 11:18:36 CET 2025 | 59 °C | 251 seconds remaining | Fan Speed: 5065 RPM
Sun Mar 23 11:18:37 CET 2025 | 60 °C | 250 seconds remaining | Fan Speed: 5065 RPM
Sun Mar 23 11:18:38 CET 2025 | 59 °C | 249 seconds remaining | Fan Speed: 5072 RPM
Sun Mar 23 11:18:39 CET 2025 | 60 °C | 248 seconds remaining | Fan Speed: 5077 RPM
Sun Mar 23 11:18:40 CET 2025 | 60 °C | 247 seconds remaining | Fan Speed: 5096 RPM
Sun Mar 23 11:18:41 CET 2025 | 60 °C | 246 seconds remaining | Fan Speed: 5095 RPM
Sun Mar 23 11:18:42 CET 2025 | 60 °C | 245 seconds remaining | Fan Speed: 5108 RPM
Sun Mar 23 11:18:43 CET 2025 | 60 °C | 244 seconds remaining | Fan Speed: 5108 RPM
Sun Mar 23 11:18:44 CET 2025 | 60 °C | 243 seconds remaining | Fan Speed: 5115 RPM
Sun Mar 23 11:18:45 CET 2025 | 60 °C | 242 seconds remaining | Fan Speed: 5128 RPM
Sun Mar 23 11:18:46 CET 2025 | 61 °C | 241 seconds remaining | Fan Speed: 5136 RPM