I thought my old thermostat opened too quickly as my 1997 Neon was taking too long to warm up the interior. I installed this one and while it can heat up a little quicker, it never heats up like my old one did. This is supposed to be a winter thermostat at 195F, but it peaks (after ten minutes of driving) at 178F. I have a Scangauge 2, so I get very accurate temperature readings. On a warm morning I reached 184F after a 20 minute drive. Disappointing! But he approached and entered easily.