Replaced thermostat stuck

[M3X3X5]

I just replaced my thermostat and housing, drained replaced coolant and am overheating. Within half a mile the temp gauge is right in the middle but climbing. I get no heat at all. I was a little sloppy putting the housing and wonder if you can foul up the assembly somehow. There was no arrow for the top on this French made Napa thermostat. I would think if I was able to torque down the housing and it does not leak it must be in place. I have not been able to bleed it yet but it has 1 to 1.5 gallons of mixture in there right now. It starts hissing out the hoses when it gets hot. I plan to break it down and maybe try to test the thermo in a pot of water in case I got the wrong temp thermo by accident. In case I maybe overlooking something obvious anyone wishing to comment would be appreciated. The water pump is not too old and was working so I don't think it would have just died out of the blue.

[th3turk]

You said you did not bleed the system at all after replacing the thermostat and housing? If you don’t bleed the system it will overheat


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[M3X3X5]

You said you did not bleed the system at all after replacing the thermostat and housing? If you don’t bleed the system it will overheat


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My bad, a bleed was all I needed. Sorry to waste your time with the post. I do appreciate the reply.