Accord 2000 ac works heat is not working?

If the AC in your 2000 Honda Accord is not working for heating, check the following: ensure the temperature control settings are properly adjusted and that the heater core is not clogged. Inspect the coolant level, as low coolant can prevent the heater from functioning. Additionally, check the cabin air filter and the operation of the thermostat. If these steps don't resolve the issue, it may be necessary to consult a mechanic for a thorough diagnosis.