First stage in my posiedon jetstream has a pressure creep

When you say creeping back to 78 are you meaning the set point temperature or the actual room temp creeps up???

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is there is a coolant or not.

You have sediment built up in the bottom of the tank, so flush the tank out.

the automatic transmission creeps? is that it?
that means the (brakes are dead) or the engine RPM is too fast.
if engine is cold (was it) the RPM can be and will be very high and will creep. so is it cold, the engine , and how cold, was it at time of creep
and what was the engine RPM.

or does e ofline mean off line or really means stalls.
as in, my engine when off line, like printer. or ?
wild guess there.

this is simple, all A./T have a clutch that has a stall speed
if you exceed that, RPM it does creep, that is how the a/T fluid clutch works. That is why say , when you idle a 800 RPM it dont creep
then you advance the throttle (engine rpm rises) there is a point
that car starts to move, this is the stall speed, threshold.
all normal.
this is why the operators guide has you start the engine brakes on
and trans in park then while holding the brake , you shift to drive
and prevent creeping,,,,,

these are controlled by scubapro due to they need specail testing equipment to repair regulators E..G now IP pressure is 135 psi and there is no adjusting screw shims and springs then the cracking effort test to see if you have pressure flutter or creep. these can not be seen with out testing equipment.

This problem seems to of weakening of the magnetic belt around your door. because of which when you shut the door lightly it will not stick to the other surface.Hence you need to press it slightly firmly to keep it intact.

Do reply if your problem get resolved. or if you need more info on this.

your spool valve needs rebuilt

bleed all ure brakes

you still have air in the system you need too bleed it some more

check your brake booster and also make sure the rear shoes are adjusted up where they belong. If they are not adjusted up the brake pedal will go farther and farther toward the floor and get spongier as they go farther out of adjustment. If you adjust them up and they back down again change your self-adjusters and springs. They are readily available at your local parts store.