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A 2003 Highlander may blow cold air due to several potential issues. Common causes include low coolant levels, a malfunctioning thermostat, or a blocked heater core. Additionally, problems with the heater control valve or the blend door actuator can prevent warm air from reaching the cabin. It's advisable to check these components to diagnose and resolve the issue effectively.
What else can I help you with?
Why would a back heater blow cold air and front heater blow hot air in a 2003 Chevrolet Suburban?
The front expansion valve is clogged.
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
Why does the heater blow hot and cold sometimes in your 2003 dodge stratus?
Most likely cause is low coolant. Check your antifreeze level.
Why would a house heater blow out cold air?
It doesn't really blow it out it just warms the cold air.
What would cause a 2003 Buick Century's heater to blow cold air when idleing but will blow warm air when moving?
Probably need to add antifreeze. Check the Radiator not the overflow tank. If you are low on antifreeze it will not circulate through the heater core.
How can you tell if heater blower is not working?
it wont blow heat itll blow cold air
Why does the heater blow heat while driving and cold at idle?
you need to replace your heater core
Why does Kia Sorento heater blow cold air?
you are low on coolingliquid !
Why would you smell antifreeze and heater blow cold air?
heater core possibly plugged and leaking
What if your 2003 toyota highlander heater is only blowing cold air how do you find out what the problem is?
I'm in the same boat: Try reading all pages on these links: http://townhall-talk.edmunds.com/direct/view/.f15850c/0 http://forums.automobilemag.com/70/6248778/toyota/2002-toyota-highlander-problems/index.html this one has photos how to do the repair: http://www.tundrasolutions.com/forums/highlander/32217-heater-quit-sort-of/
Can a thermostat cause heater in house to blow cold air?
No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.
Why does heater in a 2000 Dodge Neon only blow cold air?
you may not have the heater water hoses plugged in
