Farberware FCP280 in steady use for about a year, and a number of years owned previously. Brewed great coffee until several weeks ago. Water in pot after percolating not so hot you couldn't touch it briefly just after brewing. Weak taste--no wonderful aroma of coffee in the morning!
Followed the suggestions from Zenon: Buff thermostat and contact area, and used light scouring (non-metal) of percolator well. Also put dishwashing liquid in boiling water in pot to clean interior (approx 1 ounce).
Perked just after thermostat and well cleaned, and immediate change in water temp in pot after perk complete.
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Thank you!