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Does the compressor kick in when you turn it on?(if not it could be the a/c switch or the power to it, the a/c clutch wire connection, the clutch itself, or it's low on freon) You should hear the clutch kick in when you turn the a/c on. Low freon will also cause the clutch to not kick in. Remove the low-pressure switch plug and jump it with a piece of electrical wire. If the clutch kicks in, you just need to add some freon. Put the plug back where it was after you remove the jumper wire.
Is the belt on and adjusted to the right tension? If the belt is loose it won't cool as good as it should.
Check the freon in the system with a gage. If it's low, add some to the right amount and see if it cools. If it is overcharged, it will blow hot air, too.
The heater control valve slider should be all the way to the left so hot water isn't allowed to circulate through the heater core which would also make it blow hot air out the a/c ducts.
Good luck, they can be a pain, but with careful, step by step troubleshooting it can be fixed. There is plenty of information about a/c online to help you out. Try googling in: auto ac troubleshooting tips for more info. garcuda
You should have it checked out right away, before the overheating does any damage to the engine. The whole coolant system should be inspected to find the cause. It may be a simple fix, maybe not. Are you adding coolant constantly? Do your radiator fans come on when it starts to overheat? When it gets too hot, it may be boiling coolant away, and the low coolant level will cause the heater to stop putting out heat.
Your rear turn signal flashes fast because the front is not working. Most likely you have a burnt out bulb in the front. If your A/C compressor can be turned over by hand and doesn't lock up or make any clanking sounds it's probably alright. The compressor will not run if the system is low on refrigerant. If you're having problems with the A/C and heater controls, that would be the first ting to repair. It doesn't sound at all like any electrical problems.
it's either because your coolant isn't hot enough or your heater core is clogged and needs to be replaced.. you might wanna replace your thermostat.. because if thats stuck open then your coolant will constantly be cooled .. and thats not a good thing!!
Could be a heater core plugged or improper adjustment on the heat exchanger cable. Turn your heater on high and go under the hood and feel the two hoses on the passenger side coming out of the firewall. See if both hoses are hot when the engine is at operating temperature. If they are both hot then there is probably a problem with the cable adjustment or heat exchanger door not functioning right. If only one hose it hot then your heater core is plugged which means changing the heater core or you can take it to a radiator repair facility and they can hook up to your vehicle and can sometimes clean your heater core. We have had success at doing a bunch of plugged heater cores this way. Worked in most all cases.
Definitely check your fluid level in your radiator. Top it off all the way. I've seen that happen multiple times on cars that were low on anti-freeze. If that doesn't work try replacing your thermostat. It's cheap and the easiest place to start if topping off the fluid doesn't get you fixed up.
after checking the heater core hoses they were both hot I went in to look at the blend door and noticed it wasn't moving on hot or cold so I simply disconnected the lincage and moved to hot and its working ok. but its not completely repaired