Possible head gasket failure, Is there any steam coming out of exhaust? If thermostat was not opening engine would more than likely be overheating, but that does not explain loss of heat in cabin, unless it's now clogged, Replace thermostat and post us back. What's the temp. Gauge reading through all of this issue, hot, cold, normal, or moving around, cold to warm to hot
Tuesday, January 3rd, 2017 AT 4:30 PM