Interior thermistor value...
04-15-2002, 11:18 PM
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Interior thermistor value...
I have looked high, and I have looked low. Still I am in search of the resistor value for the interior temp sensor.
I have now went thru my whole a/c system, replacing anything leaking (many things), cleaning the dirty things, (if one ever took the time and heart ache to look at their evap coil, they would know why their a/c does not work that well. Mine was filled with leaves, small branches, and 1/32" layer of matted lint that covered 3/4 of the coil.)
Basically, I need to replace my interior thermistor (resistor), and the small pump motor behind the sensor. I was hoping to find a motor that will replace this one. If not, I will be adding one last thing to my list to buy.
If your listening Dave, I might be calling very soon.
Dozman
'85 928 Auto, Black <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
I have now went thru my whole a/c system, replacing anything leaking (many things), cleaning the dirty things, (if one ever took the time and heart ache to look at their evap coil, they would know why their a/c does not work that well. Mine was filled with leaves, small branches, and 1/32" layer of matted lint that covered 3/4 of the coil.)
Basically, I need to replace my interior thermistor (resistor), and the small pump motor behind the sensor. I was hoping to find a motor that will replace this one. If not, I will be adding one last thing to my list to buy.
If your listening Dave, I might be calling very soon.
Dozman
'85 928 Auto, Black <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
04-15-2002, 11:51 PM
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Inside sensor is a NTC resistor, (dropping temperature= increasing resistance) 20C=2570ohms\ 25C=2220ohms\ 30C=1900ohms.
When the climate control is turned on, the blower motor runs and draws in air from the passenger compartment via the sensor resistor.
Good luck
Steve C
The Great White
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When the climate control is turned on, the blower motor runs and draws in air from the passenger compartment via the sensor resistor.
Good luck
Steve C
The Great White
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04-16-2002, 10:25 PM
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Thanks Steve for the info, I have put it to good use.
Well, If anyone's interested I have plotted the interior thermistor values in Ohm's as they correspond to temp. Can give you in F or C. It's a great asset to determine how accurate your thermistor is. You will be able to tell if your thermistor is in or out of tolerance. Had a little spare time at work, so I figured I would pull out my work's control software, and presto it works.
I can also plot the exterior thermistor, if some one would care to divulge three temps with the correlating ohm's.
Dozman
'85 928 Auto, Black <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
Well, If anyone's interested I have plotted the interior thermistor values in Ohm's as they correspond to temp. Can give you in F or C. It's a great asset to determine how accurate your thermistor is. You will be able to tell if your thermistor is in or out of tolerance. Had a little spare time at work, so I figured I would pull out my work's control software, and presto it works.
I can also plot the exterior thermistor, if some one would care to divulge three temps with the correlating ohm's.
Dozman
'85 928 Auto, Black <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
04-16-2002, 10:58 PM
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Outside air sensor 0C = 93Oohms / 20C= 588ohms / 30C= 457ohms <img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />
Steve C
The Great White
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Steve C
The Great White
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