No
Could be a stuck open thermostat.
The thermostat may be stuck open
Thermostat stuck open or a clogged heater core. Service and flush the cooling system and replace the thermostat.
Blocked radiator, low on coolant, stuck thermostat, air in cooling system
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??
You could have a stuck thermostat or your cooling fans aren't working.
Thermostat stuck open. Replace! A low coolant level will also cause this problem. The blend door could be stuck also.
your thermostat in the cooling system is probably stuck open, you will need to replace your thermostat
A thermostat that was stuck then suddenly became unstuck might do that. If the coolant level and the rest of the cooling system seem OK, try replacing the thermostat.
Heater core is stopped up or thermostat is stuck open.
check coolant level check thermostat may be stuck closed