I have an early build 9-5 with a non-functioning heater resistor controller. No fan speed
My options are replace with a secondhand resistor for $100 plus my labour. No warranty, could be in same boat this time next week
Replace with a new resistor for three times that much; better chances but it's the same old system.
I have tried replacing the ACC head unit; no help. ACC head is OK. Fan is good.
What I am trying to do is replace the whole lot with a stack of parallel $4 resistors. Set up as follows.
Base pack- 4 x 4ohm 100watt resistors.
Collectively this is 1 x 1ohm 400watt resistor. But this can continually run the whole fan at full startup power. About eight times the power capability as
needed. This runs lowest speed.
As more resistors are 'stepped' in, total resistance is lowered and fan speed increases.
Higher speeds are 'base pack' plus 2 x 1 ohm 100 watt, added once or twice.
This give three fan speeds; 1 ohm, 0.5 ohm and 0.2 ohm.
Lo. mid and mid-high. High speed is just a straight through run past the resistors, 0.0 ohms.
Not perfect but less annoying than no speed at all.
I had hoped to wire this to the output of the ACC head, but this is proving complex. This would, if successful, use the up/down buttons directly.
Hence the call for others who might have considered and even those who may have abandoned similar plans.
My options are replace with a secondhand resistor for $100 plus my labour. No warranty, could be in same boat this time next week
Replace with a new resistor for three times that much; better chances but it's the same old system.
I have tried replacing the ACC head unit; no help. ACC head is OK. Fan is good.
What I am trying to do is replace the whole lot with a stack of parallel $4 resistors. Set up as follows.
Base pack- 4 x 4ohm 100watt resistors.
Collectively this is 1 x 1ohm 400watt resistor. But this can continually run the whole fan at full startup power. About eight times the power capability as
needed. This runs lowest speed.
As more resistors are 'stepped' in, total resistance is lowered and fan speed increases.
Higher speeds are 'base pack' plus 2 x 1 ohm 100 watt, added once or twice.
This give three fan speeds; 1 ohm, 0.5 ohm and 0.2 ohm.
Lo. mid and mid-high. High speed is just a straight through run past the resistors, 0.0 ohms.
Not perfect but less annoying than no speed at all.
I had hoped to wire this to the output of the ACC head, but this is proving complex. This would, if successful, use the up/down buttons directly.
Hence the call for others who might have considered and even those who may have abandoned similar plans.