Intermintent Engine Warm ups

About 1/2 of everytime I drive my 94' Voyager the needle stays burried in COLD. Then without me paying attention about a couple hours of me driving around heat suddenly comes through the vents and I look down and the temp gauge is almost at half. And then sometimes the van warms up without hesitation.


Do you think this is a bad thermostat or something else?

Yes, it's probably a bad (sticking open) thermostat