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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8312
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My grandmother's Emerson 1f83-0422 thermostat can not be

Customer Question

My grandmother's Emerson 1f83-0422 thermostat can not be adjusted above 67 degrees Fahrenheit. Every time we push the temp up button an "L" is displayed in the top left corner of the display. The user manual is confusing and of no help. What do we do to fix this so we can adjust the temperature the way we want it to be?
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.


The key pad is * locked out

Look that over in order to get familiar with your thermostat, it will also be a good idea to print it out, if you have any trouble unlocking the thermostat, post back and I will coach you on it.

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