A number of things can be happening. If the window is binding going down, the motor will draw higher than normal current and will often trip an automatically-resetting circuit breaker. It has to cool down to reset. That would explain why it takes a while before it goes back up.
Two things commonly cause binding. If the glass moves freely when you help it by pushing or pulling on it, suspect the glass is sticking in the rubber channels. Spray both of those channels liberally with Silicone Spray Lube. It goes on like water, evaporates, then leaves a film of "slippery" behind. I use it once a year on my sluggish seat belt.
If pushing on the glass doesn't help, window regulators falling apart are real common now that they're built cheaply with wire cables and plastic pulleys. There are companies appearing now that can rebuild them because this happens so often.
An electrical problem can cause sluggish windows too. Most common is frayed wires between the driver's door hinges. That will restrict current flow to the motor. Pitted switch contacts can do that too. A potential clue can be found by observing the other windows. If a passenger window is sluggish from the driver's switch and from the passenger's switch, suspect frayed wires. If any window works better intermittently when you open the door part way, suspect the wires.
Monday, December 5th, 2011 AT 8:41 PM