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Freezer heaters not working

customer states that the truck quits working after about 30min in the freezer, and once it thaws it fine. I have B+ going to the F/C distribution board but nothing coming out to the heater resistors, the relay isn't closing when key is turned to the 'on' position, checked diode on F/C distribution board and found it open, anyone else had a similar issue? Not 100% sure this is gonna fix it but. ordered one.
  • Posted 2 Jul 2019 09:14
  • By Rgshock99
  • joined 11 Jun'14 - 8 messages
  • Texas, United States
Rgshock99
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wires are are good, turns out it was the fan behind the mast was bad. replaced it and works good. thank you.
  • Posted 17 Jul 2019 21:52
  • Modified 17 Jul 2019 21:53 by poster
  • By Rgshock99
  • joined 11 Jun'14 - 8 messages
  • Texas, United States
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Check thermistors are working, heaters will not come on until they are cold, disconnect wiring at them and short them together to turn on circuit path
  • Posted 12 Jul 2019 06:11
  • By dean_f
  • joined 10 May'19 - 6 messages
  • New Zealand
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Did any of the heater wires get pinched in the multitask handle? Should have blown a fuse first
  • Posted 10 Jul 2019 07:34
  • By Ifixit
  • joined 30 Jan'17 - 174 messages
  • Pennsylvania, United States
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Fact of the week
According to studies published in the English Journal of Medicine, the impact of daylight savings is revealed by a 24% increase in heart attacks on the Monday following the spring shift forward. When clocks move back in autumn, heart attacks drop by about 21%, suggesting that loss of sleep is an important driver.