Sounds an awful lot like a head gasket. Check your oil and if it is light brown instead of dark brown order a gasket kit.
SOURCE: a/c problems
This happened to me before a couple of times and it turned out that my husband sat in the passenger seat with his long legs and kicked the rod out of the hole that turns the vent from heat to ac. If you look up under the dash on the passenger side, you will see a gold rod that controls what I would call the damper. If that has come out of the hole that turns the damper from heat to ac, judt put it back in the hole where it belongs and it should start working again. I wish I could ecxplain it clearer. If when you are up under there looking and turn the switch from heat to ac and vice cersa, you should see the rod move, but you won't see it change the damper position.
SOURCE: No heat on kia Spectra(fan blows out cool air)
The thermostat would be the place to start if you are sure its not the heater core. Heater core would have tell tale signs like antifreeze mist blowing in the vents or wet carpet soaked with anti freeze on the car floor, usually tword the passenger side. If its not the core, or the thermostat when you change it, then its probably in the hvac controls, but the core and the thermostat should be checked first. Also let the car warm up and feel both of the small hoses running into the firewall to the heater to see if they are hot. If not, one might be plugged. Hope this helps, Clay
SOURCE: hard to start hot or cold runs good when it starts
I think it may be time to change the spark plugs and wires.
SOURCE: 2005 kia spectra overheating what may cause it?
Yes, turn on your A/C your fans should come on. Check your fuses, and you can stright wire the fan, take 2 wires unplug it and run your new wires from each post on the battery to the wires at the fan. That will tell you if you have a good fan motor. If you think the fan motor is ok and good you will have to check the wiring to the fan and your water temp switch.
If you overheat an engine with a cast iron block and an aluminium head, they will expand at different rates as they have different expansion coefficients. This will usually cause separation of the gasket and if you are losing coolant, it's a near certainty. The answer is a new gasket (pennies) plus a head skim at a local engineering shop, $100 or so (otherwise it won't seal again). You need a torque wrench and a workshop manual to check the torque settings and slackening/tightening order if doing it yourself, otherwise you'll cause further warping of the head. If the head isn't skimmed, it will go again after 50 miles or so.
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