If you’re in or near freezing weather….read the following.New or Remaned Air Dyer with inoperative heater will still leaks
Caution….never drive it any where
except into warm garage or tow to have it repaired.
Otherwise…you are in risk of inoperative brake
control pedal’s valve….froze valve spool due to moisture freeze…pedal working but…NOOOO….Brake
. Been there and being fortune to be in yard slow moving before out in street.
A good working air dyer and heater is your safe guard to prevent inoperative braking. Alcohol vapor system is not your main guarantee but air dyer with heater is.
So if you plug the bleeder…don’t risk driving anywhere until it repaired.
More than likely your air dryer’s heater is not work either no electrical power to it or burn out….heater only warm up bleeder valve to keep from icing if during in or near freezing climate. Check for broken wire, poor connection to air dryer and bad 3 amp circuit breaker in Rear Junction Box of master bus bar (#3 Black 16 GA. wire on 1974 MCI 8 ). Or bleeder valve stuck open….less likely.
To get it temporary remove icing via heat gun or heat lamp with no air pressure in dryer….otherwise rushing bleeding air will keep it from warming up to thaw.
Remember heater element in air dryer is Only to keep bleeder valve from freeze while running
…..but not to heat air as you may think.
Read Bendix Handbook on page 7, 9 and 12:
Bendix Hankbook http://bendix.com/bendix/downloads/air_brake_handbook/BW5057_online.pdf
Sojourn for Christ, Jerry