ok i got summit digital gauges. well my temp always goes to 210- 215 but when i turn on heater or roll up or down my windows it shots up like 220-230? i put in the sending unit they gave me then wired stright to the wire on the gauge. so idk what to do. I got good ground on the sending unit. idk how to fix it or to just get a auto meter temp gauge and mount on my dash? i dont wanna buy a new gauge when i just bought that gauge pannel thing lol and then have 2 temps lol.