I have a pressure problem with my water well. The pressure gauge reads 60psi but I've drained the tank. I can run the pump but the pressure gauge rises to 60-70psi which alarms me. Is the most likely cause just a bad gauge? It's less than 2 years old and looks fine. We've just has a severe cold spell (for south Texas) so might that be a factor? Any suggestions wil be appreciated.

Thanks in advance,