i replaced my heater core last winter and it worked now this winter i can only get it to heat up on low blower and even then its not that hot could it be the blend door motor not opening it all the way or what PLEASE HELP

 

When the coolant is flowing through the heater core I think that both hoses should be warm/hot. If not then there is a restriction somewhere. I think that the inlet hose has a flow restrictor in it to keep pressure down, that could be where the clog is at. You might be able to backflush it and solve your problem.

I'm sure some one WAY smarter than me will chime in and let you know.

Good luck.

 

If both hoses check out roughly the same temp it could be your thermostat is stuck open. I prefer the oem stats over aftermarket.

 

would burping my cooling system help cause i notice when i get on the gas i hear a slurping noise through the dash like air bubbles are in it

 

Yes if you have air pockets in the system it can not heat properly