John for Model Number LER6620PQ0 original high limit thermostat (lower). According to Sears parts catalog is 3977767, original one is 3390291. are they compatible?
Answer Hello John, the manufacturer list part number WP3977767 as the correct thermostat for the model number supplied. However if your unit is currently using part number WP3390291, it might be best to replace it with the same part. Hope this helps! Read More... Answered by AppliancePartsPros.com | Monday, January 29, 2018