B100K potentiometer desoldering issue

So I bought a few HW-070 PWM controllers to control some LED strips. They have a B100K five leg potentiometer with switch (they have a detent you have to click past before it turns on). I desoldered the pots from the board so i could put an extension cable between them. However after doing so the power output from the board seems to remain on but at reduced power even when the pot is in the off position (the LED strip glows weakly when the pot is in the off position). The pots function normally otherwise. Unfortunately I didn't notice until I'd already done 3 of the 4 boards and i don't have a spare pot to test with. I admit I didn't test each board beforehand but the one I haven't messed with works fine. I'm wondering if its possible I ruined the pots by using too much heat when desoldering?