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sounds like a fan or fan clutch issue. i dont know if you have an electric or manual (engine driven) fan because you didnt provide year, model of alfa, or engine. could also be a partially clogged radiator
My first thought is your thermostat. One hundred ninety is not too hot.. Matter of fact, after you get it running it should always be way above 160 degrees... Simple things first... check your coolant level. Then make sure you have a good cap on the cooling system. (We used to call it a radiator cap) Your cooling system needs to operate under a certain amount of pressure. Anyway, the thermostats job is to start out closed so that the engine warms up quickly... and then doesn't begin opening until it gets up to about 180 or 190 degrees... then, any hotter than that, it becomes "wide open" for maximum cooling. One other possibility I just thought of.. Do you have an electric fan?? If the engine is, in fact, overheating, it's possible that you have an electric fan, or a sending unit, on the blitz. This is somewhat how things are in situations you described.... operates "normal" going down the road.... but "too hot" when you're stopped.... and it keeps getting hotter.
If it's equipped with an electric fan, the fan should be on when the a/c is on. If it has a fluid clutch make sure it locks up when it's hot. If fans are OK likely you have a partially obstructed radiator (internal or external). If it is only a few degrees hotter, that is normal, providing you have a 50/50 antifreeze mix and that the temp increase is not excessive. It gets hotter because the engine is working harder...a/c compressor draws from 5-10 hp to operate.
YOUR VECHICLE CALL FOR 195 DEGREE THERMOSTAT.THERMOSTAT SHOULD OPEN AT 188 TO 195 DEGREES.CHECK COOLANT FAN CLUTCH THE FAN SHOULD HAVE RESISTANCE WHEN TURN BY HAND WHEN HOT.IF NOT FAN FREE WHEELING ALL THE TIME THAT WOULD CAUSE ENGINE TO RUN HOT.
if your talking about the over head temp reading that is an entirely different system.the temps you show at 178,169,173 are all below what they should be,it should have a 195 degree thermostat in that engine,where did you get those temps,if you got them from the dash you should change the temperature sending unit. re-flashing a computer is done if Chrysler found problems in vehicles and would download the new info to the computer to correct them,
generally the fans will run at start up to run through it's initialization however they should shut off after v30 seconds until the engine reaches operating tempature. now the sensor could be the problem, but first check the fans relay it could be the fault that circuit should not close until the temp reaches 180 degrees so if the relay is shorted closed instead open the fans will always run
around 220 is about the high end of normal operating temperature,watch it carefully and if it gets ANY hotter than that then drive it right away to a highway or get it up to at least 40 mph and it will cool down to approx.150 degrees,Make sure there is enough antifreeze in it first.Also listen for the cooling fan to come on when it gets to 200-210 degrees,you may need a new cooling fan motor which is about $60.00 plus labor
first check your axillary fan for function,if change your thermostat element look at the bottom you can see what degrees open the element,you can buy element with lower degrees.axillary fan working,first stage when aircon is on.