cooling system

if the coolant level is low, it will not open. the thermostat must be submerged in coolant to operate. Roy

HOW DO YOU KNOW THE T-STAT IS NOT OPENING? YOU MAY HAVE A NOTHER REASON YOU ARE NOT GETTING ANY COOLANT CERCULATION, I HAVE SEE THE WATER PUMP FINS GO BAD AND THERE FOR YOU WON'T GET ANY CERCULATION, EATHER REMOVE THE T-STAT REINSTALL THE HOUSING AND SEE IF YOU GET COOLANT MOVEMENT OR PULL THE WATER PUMP AND INSPECT IT.