At first you find little or no heat from the heater then later on the engine may over heat.
If the coolant reservoir can not maintain the proper level of coolant, it is possible the engine could over heat when the level drops.
The new sensor could be stuck. Or the wiring could be loose, or the coolant could actually be low. Check the coolant level and the sensor wiring first.
If coolant level is correct - could be a defective sensor
Nothing all overfloo is extra coolant latter the car will be are on the normal level of coolant after a couple miles.of drive.
The coolant level is low.The coolant level is low.
Yes, if the coolant level is low, or the pump is not capable of moving coolant through the heater core.Yes, if the coolant level is low, or the pump is not capable of moving coolant through the heater core.
Could be the sensor that has gone bad if the coolant level is correct. Find a trustworthy mechanic to check that out.
Sounds like your coolant is low or your coolant level sensor could be sticking closed after the coolant was low. with the dexcool coolant it becomes thick and cause the sensor to stick closed.
To check the coolant level of a vehicle first see look for the overflow reservoir. There should be a coolant dipstick with a level gauge on it. Remove it from the reservoir to see the coolant level.
Check coolant level Could be alternator going bad Could be coolant fan going bad
coolant level could be low not letting it circulate through the heater core, causing it to blow cold. Also, if the coolant level is low it will in turn overheat.
It could be the coolant level is low or a faulty thermostat.