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Anonymous Posted on Jan 20, 2017

Have a comfort zone inferred heater that the display comes on but won't heat up. When I try and turn up temperature I get a AO5 code. What does this mean?

1 Answer

Donni Steen

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  • Master 687 Answers
  • Posted on Jan 23, 2017
Donni Steen
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Joined: Jan 05, 2009
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Make sure the unit is clean. Especially, the blower wheel. If that doesn't resolve your error code then follow these instructions.
http://screencast.com/t/RoXS239ndAhF
Look that over please, you can clean the blower wheel at the red arrow, jumper the two switches at the blue arrows as *brief tests only* just to see if the unit runs and begins to heat with the jumpers in place.
If it runs, replace the item that failed open.
If it does not run, the control module, Item 5 marked with green is most likely bad and needs to be replaced.

3 Related Answers

Anonymous

  • 2777 Answers
  • Posted on Sep 09, 2010

SOURCE: I have an AO5 error

This indicates a power fault inside the actual heater. Have you tried unplugging the heater, letting it sit for a good 2 minutes, and replugging it back in? If the problem persists you will unfortunately need a repair. Please let me know if you need more information on this. You can also contact comfort zone, the manufacturer, located in Canada, at 780-420-6572.

Thanks so much for the question,

Tim

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  • 7 Answers
  • Posted on Oct 02, 2010

SOURCE: change temperature from Celsius to Fahrenheit on a comfort zone h

To change your heater display from Celsius to Fahrenheit: press and hold the "down" button and the "enter" buttons simultaneously for 5 seconds and release. - VS

Anonymous

  • 2 Answers
  • Posted on Jan 11, 2013

SOURCE: My Comfort Zone Utility/portable infrared heater, model CZ1500-WO is displaying an AOS error code and will not turn on. What does that mean and can it be repaired?

If the relays are clicking there is 2 1000 uf capacitors on the board that if looked at from the side they will be domed they are bad. Replace and the problem is solved.

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