If you have a 6-month filter, schedule your filter changes when daylight savings changes. When you "spring forward" or "fall back" setting clocks around the house, change your filter at the same time.
When it's time to change your filter on your Maytag, Whirlpool or Jenn-Air refrigerator, these UKF7003 filters should fit your needs. These are compatible with PUR filter system and replace the PuriClean UKF7003AXX filter in your fridge. They are NSF rated, meaning that the water filter has been certified to remove or reduce contaminants in your water by at least 80%. They also reduce or remove the chlorine taste and odor from your water, creating clean ice and water for cooking and drinking.
The refrigerator water filters have a water capacity of between 300 and 416 gallons, and a pressure of 30 to 125 pounds per square inch. Optimal temperature use is between 33 and 100 degrees. They have a flow rate of 0.5 gallons per minute. They last about six months under normal circumstances, but make sure you check the red indicator light from time to time. If your water pressure slows or there is a "funny" taste or smell to the water, it is time to change the filter. Changing fridge filters is easy; simply unscrew the old filter and remove. Then screw in the new filter and you're done! No tools necessary. A supply of three filters should last you about 18 months.