This is just after a new battery installed, and a communications problem with the PCM ( power train control module) see https://www.chryslerforum.com/forum/...er-tach-17147/

The weather turned cold yesterday, and my wife complained of no heat in her '05 Pacifica. The fans seem to work normally, but only cold air coming out. I followed a procedure to insure no air bubbles in cooling system, found here, but no difference. She also said that her car normally had a "delay" announcement when cold started, and I found a procedure to successfully re-enable that. Is there a default that was enabled when the PCM was disconnected then re-connected that would cause this ( no heat ) condition?

If not, I'm suspecting the Thermostat, but it is not running hot.
I see from the procedures that for these chrysler products I keep seeing
this : "The OEM thermostat is staked in place at the factory. To ensure proper seating of replacement thermostat carefully remove the bulged metal from the thermostat housing using a suitably hand held grinder. It is not necessary to restake the replacement thermostat into the thermostat housing."

Is this normally a troublesome procedure? Does this car have a thermostat housing bleeder valve on it as well ? Perhaps I should try that, as the top hose from the radiator is appropriately warm but not as firm ( I can squeeze it in my hand) as I'm used to on the Saab.....