Switch under counter.......
sounds like it could be ON/OFF switch for the water heater electric heating element IF you have a combo water heater (electric/gas).
And if you do and you turned that switch ON hopefully you had already filled water heater otherwise you will probably need to replace element as they do not last very long when ON and not submerged in water.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31