Help, heating up issue in Civic 2007 Reborn

[shafikhan1]

My honda reborn was alright, but 3 days back, a Mehran struck my back door and danaged it-I repaired the door but now the car is heating up in traffic jams while AC is on. When i off AC, the temerature comes down to normal-
Dont know the reason ?

[pwuser153659883132]

Bro some times it happens due to heating core issue, check ur left side mat, agar mat neechay se nami wala ho tou cnfrm heating core issue hai simply bypass ur heater

[pwuser150791597597]

Salam
I also have a problem which no mechanic is able to solve
I have a honda civic 2009 model reborn actually the problem is radiator is reducing coolant when coolant reached very low level ( after N drive of about 30km) car starts over heating but there is no leakage or anything car performance is perfectly fine also no sign of blow headgasket ( no bubbles in radiator - no white smoke from exaust - no overheating - i open the radiator cap and start the car but coolant is still no blow of coolant from radiator ) some mechanics are saying its headgasket problem but no one is sure about it

Another thing i noticed today is when i drive car after filling radiator and waterbody after 15km drive i stop the car check radiator actually the water from radiator was going into waterbody and then blowing with pressure from waterbody

[pwuser165778278747]

same problem with my civic reborn 2010, please advise me.