Keg - Carbonation was good, now its not?

[JoeCap09]

I am very new to kegging. I kegged a raspberry wheat a couple weeks ago and drank it all week last week. It was perfectly carbonated and tasted great. The problem however is I poured myself some last night and it seems to taste flat and the head wasn't lasting as long as it did last week. I have it set at 14 psi and its been on the co2 for atleast 3 weeks. Not sure exactly time, I don't have my calender with me. I'm puzzled???

Thanks

 

[TelemarkBrew]

what temp is your kegerator? is ther 14 psi serving pressure the same as the pressure you used when it was force carbing?

 

[JoeCap09]

when i first kegged it i used 30 psi for like 36 hrs. The kegerator is at about 35 to 40 degrees. the beer pours at about 40 degrees. Kegged on may 19th. I just don't get how it was good last week all week and then yesterday it just tasted different. more flat.

 

[TelemarkBrew]

not sure 14 psi at 40 degrees should be pretty highly carbonated. sorry can't help you.

 

[sketerbuck]

Have you checked for a leak in your co2 hookup or your keg