Jean L Gilbert , AZ October 23, 2016 Appliance: Whirlpool 1234W0A Whirlpool Range 1234W0a: Broken grill vent. How to replace Microwave Charcoal Filter. Ordered the right part and bolted it on. Great fit, first try. Problem solved. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes