I need help pls. Experiencing problem with the temperature gauge. Actually pinagalaw ko yung temp gauge kasi pinalitan yung bulb sa loob so binuksan siya. After maibalik, lumabas na yung problem as illustrated below.

I brought it to Ceejays to have it checked and fixed. Unfortunately, kinalas nila ulit and opened the inside of the gauge, di nila naayos yung problem. Sabi ni Ryan of Ceejays is masyadong mababa yung idle ng vios ko kaya hindi raw nagengage yung compressor kapag hindi umaandar yung kotse. He is advising me to have an ECU reset or reflash kung di gumana since di naman daw sira compressor or yung magnetic clutch.

But the way I see it, what he said is a different thing kasi lumalamig naman yung aircon ko yun nga lang hindi dun sa setting nung gauge. My initial diagnosis is parang may misaligned sa loob nung gauge kaya hindi nadedetect yung proper settings ng temperature. Or may something faulty at hindi nagcome into contact sa loob. Now my problem is I don't know if I set my temperature to a maximum and quite bothersome din kasi baka maging cause ito ng overheat. Any inputs?