overheating 2003 wrx

sorry in advance if this isn’t the right sub to be posting car problems. but i have a 2003 subaru wrx that keeps overheating in city traffic. my drive to work and back home is generally about 15 minutes city and 15 minutes highway both ways. my car has no issues driving home but it seems like if i do anything else after work the temperature immediately starts rising. i find it really weird that it seemingly works fine for a set amount of time but anything after that it can’t handle. also it seems like blasting the heater isn’t helping to cool the engine at all. if anyone has any ideas on what the problem could be that would be great. thank you in advance

submitted by /u/joesbutt
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