Upon arrival customer stated that the water would sometimes seem to run out when they would use a lot, and it would take about 30 minutes for it to return. Went in crawl space while running water at hose bib to test pressure switch to see if it was working properly. Pressure switch was working properly, getting correct voltage. Pressure tank was functioning properly. Tested power at well head, getting correct power. Was unable to recreate issue of running out of water. Customer stated well pump had probably not been replaced since house was built in 1981. No tag on well head stating depth or hp. Gave customer price on pulling pump and pinpointing issue. Customer will call back if problem persist.