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Michael, Customer Service
Category: Appliance
Satisfied Customers: 9568
Experience:  I have been an appliance repair tech for over 30 years and will help you solve your problems.
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Honeywell CM900 - showing internal error with flashing spanner

Customer Question

Honeywell CM900 - showing internal error with flashing spanner and fan. What do I need to do
Submitted: 4 years ago.
Category: Appliance
Expert:  Michael replied 4 years ago.


Hi Please try this if it doesn't work you will unfortunately need to replace the thermostat.

You can try a reset this way. Take the batteries out for a few min and also put them in backwards(that will clear the memory) then replace them the correct way:-) Sometimes helps .

Good Luck

Tech Michael