Over heating When I drive my vehical for approximately 2 miles it starts to over heat. The heater blows hot air until the thermometer almost goes in the red then it starts blowing cool air. I checked the top radiator hose and it's really hot and the bottom is cool. I've changed the radiator,thermostat,radiator cap, and it's still over heating. Any ideas?

clogged heater core --faulty heater control valve --mode/blend door faulty

Firstly, a thermostat that opens quicker will not give you better heat. Your heater core may be partially plugged causing a low flow issue. Another area to check would be the water pump impeller for corrosion or slipping on the shaft. Does the vehicle's cooling system operate well otherwise?

Are you talking about the engine cooling system or a problem with your Auto A/C?

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this is because your vehical is heated by hot coolant flowing through a small radiator the blower motor blows air through this and out your vents and gives u heat but unless you drive your vehical the coolant will not build heat for quite a period of time there for your interior will not warm up as quick

You might check the coolant level after the engine cools,if it's low add 50/50 mixture of coolant and water. Keep an eye on the level to see if it happens again. You might have a small leak in the system. Good luck

Do this when cool. Take radiator cap off, start the engine, turn on heat (not defrost) and now top up coolant to about an inch or 2 from top of radiator, as level drops down, and let vehicle run until the radiator fan comes on, then off, about 3 times, and add coolant as needed while it's running. After that, put radiator cap back on tight & make sure return bottle is filled to proper level. Now try that & see how heat is, temperature gauge etc, and keep an eye on return bottle level for a while. Let me know how it is.

change the water pump and check for a blockage in the waterjacket

You have a circulation problem, heater core may have restriction that why heat only comes when you drive ,also you may have a thermostat that stuck in the open position. Good Luck