1. Timely checking
Call a professional to check and do maintenance of your system. Regular checking can help to repair the problems when they are small which prevents your unit from major problem. Spending few dollars on maintaining your system will prevent you from large repair bills.
2. Checking your thermostat
Make sure that thermostat is set to heating mode and the temperature set is not to low. Try changing the batteries of your thermostat.
3. Checking the switches
Check the circuit breaker of your gas furnace it might have been tripped. On the furnace there is SSU switch which looks like light switch make sure that it is in “ON” position.
4. Cleaning your furnace
Doing the regular cleaning of your furnace, clean the blower motor, heat exchanger and other major components as they develop dust around them and can cause damage to the components. Cleaning the system allows the system to work smoothly and reduces the repairing cost.