Interior Heat not hot

Hello, I work with Honda's daily and can't think of a single ventilation concern affecting heating within a 2015 Accord in my repair shop. That doesn't mean it can't happen, it just means that it's an unusual concern and is likely related to attempted repairs more than an actual concern. I can't remember a time where a Honda water pump 'failed' to circulate coolant, which means someone was almost certainly guessing -- and guessing badly. My biggest concern right now is that with these invasive repairs, you have introduced air into the cooling system. The air pockets can cause a lack of heating, as well as other issues. Also, what quality and temperature thermostat was installed? Only a Honda factory part should be used to ensure it opens at the proper temperature -- and not sooner! Lastly, all cars require use of air conditioning system operation to defog the windows. That's entirely normal. Your system - set to front defrost - will always engage the air conditioning compressor. Air conditioning does not only "create cold air", but it also dehumidifies the interior of a space, causing the windows to defog. I'd strongly recommend getting a different opinion from a different technician as to what is going on. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops