Check coolant level? Heater core plugged or restricted? Heater core airbound? Bad thermostat? Water pump not circulating coolant? Heater control cable not adjusted properly?
A car can run at normal temperature but still blow cold air if coolant isn’t circulating through the heater core. Common causes include low coolant, air trapped in the system, a stuck thermostat, or a faulty heater control valve. It’s usually not a major failure at first, but it’s worth checking soon—especially the coolant level—before it turns into a bigger cooling system issue.
it could be the heater core and ac housing unit that allows hot air to be mixed with the cold air or it could just cancel out the cold due to the motion of the car
An automobile's heater that blows only cold air could either be a faulty thermostat or, more likely, a faulty heater core. A trip to a mechanic or shop that specializes in radiator and cooling system repair should be able to diagnose and repair any problems.
You may be low on coolant, or the thermostat is stuck open, or the heater core is plugged up, or the temp blend door is broken.
Although my car is not an Eclipse, I experienced the same issue. A mechanic determined that my radiator was partially blocked and recommended replacement. My heater now blows heat whether I'm stopped at a light or moving.
Well the main reason why your car blows out cold then hot is because the air conditioner may not be working properly. You should go to the car shop and get it fixed.
check heater core could be cloggedCheck the engine coolant level also.*no, the heater relies on the engine for heat and when you drive the engine warms generating heat:)*
The Air Conditioner is on
Maybe thermostat is stuck open With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Could be a bad heater core...also, could be low coolant level. With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Defective heater temperature control valve.
If your heater is blowing cold air, it’s usually something simple: low coolant, a stuck thermostat, or air trapped in the system. Start by checking coolant level no coolant = no heat. If that’s fine, the thermostat or heater core could be the issue.