Noticed coolant leaking, so I changed the waterpump. Soon after, the engine started to overheat, so I figured the thermostat might be stuck. I replaced it. Engine still overheats and no hot air comes out when heater is turned on. Googled this and said that there might be an air pocket and system...

I just received diagnostic code P0128 while driving home. From my search I understand it is an issue with the thermostat or coolant. Which makes sense as the following has played out in the last few days: 4 days ago I noticed my coolant level was about a half inch below the minimum line on the...