Did it ever work right for you? You may have some restriction in the normal recirculation path that exists to warm the engine when the tstat is closed. This causes increased water pressure and overcomes the spring pressure of the tstat.
Did it ever work right for you? You may have some restriction in the normal recirculation path that exists to warm the engine when the tstat is closed. This causes increased water pressure and overcomes the spring pressure of the tstat.