In cold weather, you'll notice that the engine temperature gauge registers only slightly or not at all, particularly if you're driving at highway speeds. You'll also notice that the temperature of your passenger compartment heater isn't nearly as warm as usual.
Your car will show a temperature if you allow it to idle for several minutes. The heat flowing into the passenger compartment will be warm as usual.
If your thermostat is open, the engine will rarely warm to a level you're used to seeing on the temperature gauge.
If your engine takes a much longer time for the thermostat heat guage to reach its required level of operatiing temperature then the thermostat may be stuck in the open position which means that it will need to be replaced.
Thermostat is most likely stuck in the open position; replace the thermostat.
If the thermostat is broken in the closed position the engine would overheat rapidly. If it was broken in the open position the engine cooling system would not reach normal operating temperature and the heater would produce only warm air. Take the thermostat out and put it in a pan of water on the stove. When the water gets to around 200 deg F, the thermostat should open. If it doesn't it needs replaced. Observe carefully that you have not installed the thermostat upsidedown.
The thermostat is probably stuck in the open position.
possibly thermostat stuck in the open position?
That is the most common symptom of thermostat stuck in open position.
Yes, if stuck in the open position.
Replace the coolant thermostat. It is probably stuck in the open position.
Thermostat stuck in the open position. Replace the thermostat.
If the thermostat is stuck open, the engine will never warm up to proper temperature.
Thermostat failed in open position or radiator fan permanently on
Check the coolant level. Or, thermostat could be stuck in open position.