If a thermostat is stuck open it will cause the "bubbling". The thermostat opens and closes giving your coolant time to cool off in the radiator. When stuck open the coolant will keep circulating and just get hotter and hotter until overheating occurs. You should change it right away. I hope this will help you. If by "open" you mean that it is stuck in a position which allows coolant to constantly flow then the last answer is FALSE. If it is stuck open, and coolant constantly flows, then your engine will not heat up to the proper temperature. It will constantly be cool, because guess what, that's what coolant flow does. That means your bearings will not expand properly and such causing a host of other engine problems. If it is stuck open, then you need to replace it.
A stuck open thermostat will not allow the coolant to get up to proper temp, thus poor heat from heater. A stuck closed thermostat will not let coolant circulate and will cause the engine to overheat.
check coolant level check thermostat may be stuck closed
thermostat is stuck shut
If the pump is not circulating coolant insure that the thermostat is not stuck closed. If the thermostat is ok then the pump will have to be replaced.
Low coolant or stuck open thermostat.Low coolant or stuck open thermostat.
Got coolant? Thermostat stuck closed? It could be the head gasket if you are very low on coolant and you cannot figure out where the coolant is going.
Thermostat stuck open. Replace! A low coolant level will also cause this problem. The blend door could be stuck also.
Replace the coolant thermostat. It is probably stuck in the open position.
this is normal for this engine, in fact anything short will trip a check engine light. the cause will be a low coolant condition, a thermostat stuck in the open position or a bad coolant sensor. this is normal for this engine, in fact anything short will trip a check engine light. the cause will be a low coolant condition, a thermostat stuck in the open position or a bad coolant sensor.
Blocked radiator, low on coolant, stuck thermostat, air in cooling system
If the engine is overheating, the thermostat is stuck closed. If the heater is not putting out enough hot air the thermostat is stuck open. Change the thermostat as a normal part of maintenance when changing coolant.
Low coolant, bad coolant tank cap, stuck thermostat, or clogged coolant line.