Get it warm and feel both heater hose's at the firewall and see if both are warm. If not, the heater core is probably plugged.
I assume this is the Climate control heater three things can make it not work correctly, 1) your engine coolant system's thermostat has either been removed or it is bad and stuck in the fully open position. 2) You car had a frozen radiator/coolant system. 3) Your heater coil is bad, and needs to be replaced.
Could be low coolant, stuck thermostat, bad heater control head (if climate control)
Sounds like your heater core is leaking engine coolant (antifreeze) If that is the case it will have a sweet smell and will fog up the inside of your windows.
There are two separate sensors that play here. the "coolant temperature sensor" and "coolant LEVEL sensor". I suggest confirming which of these was replaced, as it is very common for them to be confused. likely you will find the coolant sensor that was replaced was the one on the engine (temperature); The LEVEL sensor is mounted either in the coolant resivoir or in the radiator. Probably just need the proper sensor replaced.
Only if the sensor is malfunctioning.
Low coolant level? Cooling system airbound? Bad thermostat? Water pump not circulating coolant? Heater control cable not working?
ur climate control not working.
The difference in heater controls!Ok! First of all every car has a heater core-a heater core has coolant running through it at engine temp. This is what heats the car when you turn the temp. control to warm! The climate control does the same job as your heater control! But, is electronicly controlled! Climate control is nice but it is very expensive to fix if something breaks! So, if its up to you which one you want but think of the cost!
There are two separate sensors that play here. the "coolant temperature sensor" and "coolant LEVEL sensor". I suggest confirming which of these was replaced, as it is very common for them to be confused. likely you will find the coolant sensor that was replaced was the one on the engine (temperature); The LEVEL sensor is mounted either in the coolant resivoir or in the radiator. Probably just need the proper sensor replaced.
According to the 2002 Ford Explorer Owner Guide : For the 4.0 litre SOHC , V6 engine : The engine cooling system capacity is : WITHOUT auxiliary climate control ( 16.3 U.S. quarts ) WITH auxiliary climate control ( 18.2 U.S. quarts )
You may not have enough coolant. If you've recently drained and replaced your coolant, replaced all the coolant after replacing a leaking line, etc., you may have an air pocket in the system, which will need to be 'burped' out.
you replace that with coolant in the summer or hot areas