Mikeruhls

So I'm in nj and it's cold here now n my heat only blows warm air. I recently bought a Stant 195 thermostat gasket water pump belt flushed cooling system, disconnected heater core hoses and ran water through but no cleaner and not much pressure in hose . Can the thermostat be faulty? If I remove the Tstat completely would running it in the winter be bad and will my vehicle will i still get heat if it's out just to troubleshoot. Can hear blend door flapping shut don't believe it's that. And there's no heater control valve it's a 98. Basically I want to remove stat completely and see if it gets heat better as a troubleshoot? Sound like that will work? Also I don't like the vinegar idea but anybody else got any ideas for cleaner for the heater core?

freegdr

removing thermostat will make it colder

Mikeruhls

Ohhh really huh good to know. Any other advice on fixin heat then? R there vac lines to check but I don't think there's a leak cuz my blower would be switching up on acceleration correct?

freegdr

no control valve might just need to flush out heater core better

xjsnake

Verify correct engine running temperature (200-210) using something other than the gauge on the dash and if running at a good temp flush the heater core again.