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Sean
Sean, HVAC Technician
Category: HVAC
Satisfied Customers: 131
Experience:  Owner HVAC company
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What does an L9 code on a carrier thermostat mean?

Customer Question

what does an L9 code on a carrier thermostat mean?
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: thermostat-
JA: Do you plan on doing the work yourself?
Customer: depends on what the problem is
JA: Anything else we should know to help you best?
Customer: the unit won't switch over to heat from cool. I have replaced the batteries with no results
Submitted: 1 month ago.
Category: HVAC
Expert:  Sean replied 1 month ago.
Can you give me the model number of that specific model thermostat ?