Chrysler Repair Questions? Ask a Mechanic for Answers ASAP
Hello and thank you for your question,The problem you are describing is most likely caused by a failing thermostat or the system is low on coolant which is likely if you are blowing white smoke. White smoke in most cases means coolant is entering the combustion chamber . I would start first with having a block test performed to make sure the head gasket is not leaking. Low coolant can affect the heater performance as well.
The best way to test it is to replace it with a known good thermostat. That being said you really do need to check the head gaskets if you are blowing white smoke. If the coolant is low it will affect the heater and the gauge as well.
Yes if you have white smoke on start up its very likely. If your only adding a little coolant right now then its likely just seeping and not a full blown leak. If the cooling system is full and you still have a low reading gauge and low heat then I would start with replacing the thermostat.
Okay thats where I would start, just make sure when doing so to fully fill the cooling system.