Anyone, please help with this problem. I have a 95 Integ SE with 180K miles. I have replaced the Rad (aftermarket) 2 yrs ago but did not replace hoses, stat...just the Rad and the system worked great. Recently, the Rad go leak so I bought another aftermarket (seem like the right part b/c the look and config are the same as the previous one). I also replaced upper&lower hoses and OEM stat when I replace the Rad second time (about 2 mons). Since then, I realize the Temp Gauge is about 1/4 from C when I set the Heat Control to Max (hot side), one of the fan is ON once awhile and both are ON when I set AC ON. Even though the Temp Gauge low, the heat working great (takes about 5 minutes idling to get heat in winter time). But when I set the Heat Control to Low (cool side) the Temp Gauge is about 45% between C & H. I already check System Leak but no evidence found plus the Reservoir Container has not been low at all. I have thought about the Stat but if that the case then I should get heat when the Temp Outside drop to teen, right? plus this is the OEM part I got from Acura Dealer.

Anyone have any idea what the problem is? Thanks in advance