AC works without an orifice tube!
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AC works without an orifice tube!
Yes,
You read right.
I R&Red my compressor, accumulator and evaporator on my '94 f-150 this weekend and forgot to put a new orifice tube down the input tube on the bottom of the evaporator.
I had no idea what I had done unit I started refilling it with freon and it would only take a 1.5 cans. The pressures were 100 low by 175 high and it was blowing colder than ambient but not 'nice and cold'. That's when I realized that I had forgotten the orifice tube!
The only thing I can figure is that there was enough evaporation action in the evaporator to keep up a significant enough pressure differential for the system to actually work! In essence, the evaporator core was acting as the pressure separator for the system (albeit not very efficiently).
I re-evacuated the system, quickly opened the evaporator liquid (input) tube and slipped in a red orifice tube. Now it works great!
FYI,
Herb
'94 F-150
COLD AC!
You read right.
I R&Red my compressor, accumulator and evaporator on my '94 f-150 this weekend and forgot to put a new orifice tube down the input tube on the bottom of the evaporator.
I had no idea what I had done unit I started refilling it with freon and it would only take a 1.5 cans. The pressures were 100 low by 175 high and it was blowing colder than ambient but not 'nice and cold'. That's when I realized that I had forgotten the orifice tube!
The only thing I can figure is that there was enough evaporation action in the evaporator to keep up a significant enough pressure differential for the system to actually work! In essence, the evaporator core was acting as the pressure separator for the system (albeit not very efficiently).
I re-evacuated the system, quickly opened the evaporator liquid (input) tube and slipped in a red orifice tube. Now it works great!
FYI,
Herb
'94 F-150
COLD AC!
Just not nearly as well as forward... 