1. The thermostat is not working properly if your furnace does not produce heat, check battery level in the thermostat. You can also replace the battery.
2. Dirty air filters lead to a multitude of furnace problem. Dirty filters reduce airflow.
3. Too noisy furnace indicate a mechanical problem.
4. Blower issues may indicate a problem with the limit switch.
5. Cycling between on and off modes frequently check thermostat settings.
The Furnace not producing heat- if it is only blowing air but not warm air, you might have a setting on the thermostat preventing it from producing heat.
The Furnace does not turn on automatically- It doesn't turn on the circuit breaker might be off in such case, look at the breaker box and flip the furnace switch.
The Furnace keeps turning on and off- Lack of airflow in the home furnace is the cause of short cycles due to overheating.
Strange and loud noises- Excessive dirt in the burners during the combustion process causing the gas to go unburn.
Blower problems- The belt needs lubrication or in case it's worn out it will need replacing.
crack heat- Carbon monoxide can also fill the entire house which is very dangerous.
Rotten egg smells- The methanethiol added to the natural gas is the reason why it stinks.
Worn out ball bearings- The motor over time they wear out needs replacements.
The most common home furnace problems include issues with the thermostat, dirty or clogged air filters, malfunctioning ignition or pilot control, and wear and tear on mechanical components.