Should i be concerned that the heater in my Honda Accord 99 heater is blowing really hot air the check engine light has been on for a month and i just had transmission work done 3 months ago?

Yes, you should be concerned if your Honda Accord's heater is blowing excessively hot air while the check engine light is on. This could indicate a problem with the engine's cooling system, such as a stuck thermostat, which could lead to overheating. Additionally, since you recently had transmission work done, it’s important to ensure that no issues are related to that repair. It's advisable to have a mechanic diagnose the check engine light and the heating issue to prevent further damage.