Thread: What did I do?
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Old 11-07-2010, 08:43 AM
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For starters, your coolant level is low and you have air in the system. This is why you have no heat - theres no hot coolant clowing into the heater core. Let's start with the easy stuff. First of all you need to refill the cooling system and try to determine the source if coolant loss. Leaks and old, worn out radiator caps are the most common causes. I'm gonna go out on a limb and guess you don't own or have easy access to a cooling system pressure tester which would test the system and cap both. The cap isn't a big deal to replace since they're cheap so you may want to do that when you refill the system. Once it's refilled, start the engine and let it reach normal operating temp. The system should now be under pressure which will make it easier to hunt down any leaks and you should have heat in the cab. If you smell coolant in the cab and the windows fog up when you turn on the defroster, you probably have a leaking heater core. Other possible causes of your problem could be a bad t-stat, clogged radiator, blown head gasket/cracked head, or water pump that isn't flowing what it should but from what you describe, it's not likely to be that serious.
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