Chrysler Repair: Chrysler Sebring Convert. Heating, sebring convertable, chrysler sebring

Question
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Followup To
Question -
My Chrysler Sebring convertable only blows heat at 35 mph. What could be causing this?
Answer -
Hi Jon,
I assume that you mean you only get heat if you are going 35 mph or Faster? Several possibilities:
Is you blower fan working? If not you would only get heat if the car were moving fast enough to drive air through the heater core.
Is the water getting to the core hot enough when you are going at slow speeds? What does the temp gauge show: it has to be above about 1/4 to have sufficient temp to produce warm air. If the gauge doesn't show that level of temp, then perhaps the thermostat in the engine is stuck open which prevents the water from getting warm enough until the engine is going at higher rpm's.
Is there enough fluid in the system? The overflow bottle should have some coolant in it, look at the lines on the side of the bottle. Insufficient fluid may keep water from rising to and passing thru the heater core.
Does the push button selector that diverts the air to various locations respond to your choice? If not, then the vacuum line that operates the control doors may be disconnected and if that were the case the air to be warmed may not be being sent across the heater core.
Is the water flow thru the core sufficient? Feel the in and the outflow hoses to the radiator. They both should be pretty hot; if one is cold, then the core may be clogged. Use a garden hose to backflush the core.
So check/investigate these possibilities and get back to me if you still haven't resolved the problem.
Roland

According to the manual there is a "special way" to add coolant to the 2.7L engine.  Do you know the special way?  It seems to me that the pressure cap and the fill cap are the same?. Also I read the the orange coolant in there now may be an issue in the future with corrosion.  Is this true?  Thanks,

Answer
Hi Jon,
I don't know of any specific way to add fluid to the 2.7 system. Might it be that the fluid should be added to the overflow bottle so that it is sucked into the system when it cools down?
On the dexcool (orange), I understood it to be more resistant to corrosion rather an issue for corrosion concern. But again, I don't know what the concern was or where is was raised.
Roland