[s-cars] T-stat headaches!!

[Mthdealer at aol.com]

Replaced T-stat for 3rd time this year. Most recently 2 weeks ago. Was OK for
a couple of days with dig readout on clim control rising to 87 and staying
around there. Now Temp gauge rises to to 11 oclock and stays there, but the
dig readout now varies between 70 and 80. Air temp in around 75F. Any ideas
what's going on. Maybe air trapped somewhere? Is the dig readout sensor the
same as the gauge?
thanks,
Dave 95.5 S6