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you can completely by pass the heater core by disconnecting the two 5/8 s hoses that go through the firewall of your vehicle and the engine will cool fine the main problem is that the heater core runs the window defroster and keeps the fog off your windshield. You should only bypass the heater system in an emergency, for example a hose breaks in the middle of nowhere and you need to get to town to replace it.
Also, if the heater core is connected, and your engine overheats, you should turn the heat up all of the way with the fan blowing at it's highest speed. IT helps to dissipate the excess heat.With it disconnected, you would not have this option for cooling the engine in a emergency.
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Will low coolant cause a cars heater to not work?
Yes. The coolant carries the engine heat to the heater core. Without coolant the heater core does not get warm.
Why is there no coolant flow into the heater core?
The presence of the valves usually restrict the coolant flow into the heater core.
Does not having freon affect the heater core?
no the freon is strictly for making cold when the a/c is being used in the summertime and what makes the heater core works when heat is needed is the coolant
Does low coolant level in radiator affect the heat output in winter?
Yes. The heater core provides the heat which blows out your vents. The heater core has engine coolant flowing through it (it is like a mini radiator) which creates the heat which warms the air that comes out your vents. If you have low coolant, there may be no coolant circulating through heater core, thus causing cold air to blow out vents.
How do you change the heater core of a 1997 corolla and what are the symptoms of a bad heater core?
coolant on the floor
In a 1998 Subaru outback the heater blower works but no warm air?
In Subarus the temp control for the heater does not control the coolant flow, just airflow past the heater core. If you get no heat, there is no coolant in the heater core -- either there is no coolant or it is not circulating.
What causes heater core to not get any water when car is not losing coolant or overheating?
Heater core may be air bound and have to be bled Heater core may be plugged or restricted Thermostat may not be opening allowing coolant flow to core
If the heater core is not replaced can it cause damage?
If your heater core is LEAKING engine coolant so that your engine coolant level drops too low or the engine coolant is lost completely and causes your engine to overheat then your engine can be damaged beside the mess the leaking coolant makes inside your vehicle ( you might be able to just temporarily bypass the heater core so that no engine coolant is flowing through the heater core )
Why does the heater on a 1986 Chrysler Lebaron only blow out cold air?
Low coolant? Thermostat not opening? Control cable not working? Plugged heater core? Heater core "airbound"? Low coolant? Thermostat not opening? Control cable not working? Plugged heater core? Heater core "airbound"?
Why is coolant leaking from the heater drain line on the engine firewall of a Pontiac sunfire?
heater core has a leak replace heater core
Does the heater work when the coolant level goes below minimum level?
The heater is dependent on the coolant flowing through the heater core. If the coolant is low then there will not be any heat.
Why is your car defrosting on the inside and coolant leaking on the passenger side?
the heater core, heater core hoses or heater control valve is leaking
