When you call Nissan Air to repair or clean your furnace you will get these extra steps at no extra charge that are done to ensure that your furnace is safe to operate.
1- CO2 reading .
2-Testing the high limit of the furnace by disconnecting power to the main fan motor to see if the high limit cuts out as it should ,high limit is there to ensure that your furnace will not reach an unsafe condition(Over heating) in the case of a broken fan motor !!
3-Testing the pressure switch by blocking the furnace exhaust pipe outside to see if the pressure switch can sence that and cut out the gas flow to the burners and then watch to see if the furnace will recover and re light the burners after going through the sequence of operation.
4-Adjust the manifold gas pressure to ensure that it is not over firing nor under firing ,a 3.5 " WC is the recommended pressure pass the gas valve
5- This final step is the easiest among them all which is to Clean and inspect the flame sensor for better heating operation.
Nissan Air is only a phone call away 416 200-1971
"The only easy day was yesterday"
www.nissanair.com
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