I replace the thermostat and it is not opening…I have let the car run for over half hour, even went for a short drive, nothing, the thermostat is not opening. I was only able to put half the collant in, and the heater isn’t blowing any heat ( makes actually a weird noise when I change settings) is it possible that a brand new thermostat ( rock auto, Brand is Facet) could be defective?
Cons: thermostat not opening, heater not blowing heat, possibly defective
Vehicle:
Mazda