[ashley]

i went out into the shop and the door wouldnt open.  the air pressure was all the way down.  then i heard the compressor try to start.  i felt it and it was very hot.  the head pressure either isnt releasing enough or the compressor is struggling.  

oh well, i needed something to do..

tom

Tom sounds like the check valve bad. You can crack the output and bleed off. if it works its the check valve