[Supras] A/C booster fans

[Eric Boeck]

Hey Guys,
 
Are those two little electric fans thermostatically controlled?  And do they
run if the engine is hot but turned off?  I ask b/c with this heat wave
going thru here, yesterday when I used the A/C (retro'd to 134a), then
turned off the car and came back 10 min later, the rad was boiling.
Literally boiling and just a-bubblin vapour out the overflow!!!!  Rad <
10kkm, new cap, engine temp was normal.  All I can think is that heat built
up between the condensor and rad, and caused it to boil the fluid.
 
Noooo, it's not a BHG.  Checked that a little while back (sniffer).  And
there is NO way you'd get this much bubbling with a BHG.  I mean a roiling
boil!!!
 
Anyway, anyone retrofit a temp sensor to keep the fans on if the temp behind
/ between the rad was over a certain amount?  Thinking I might need to do
that.  Set it for say, 80 deg C, and use a relay to keep those fans on until
it drops below that.
 
LMK
 
Eric
91T