You can avoid expensive repairs by troubleshooting Lennox G51MP pressure switch problems before calling a professional. Pressure switch failure is much less common. You need to properly diagnose the Lennox G51MP to solve your furnace problems.
There is a manual reset roll-out switch in Lennox g51mp. If it is regularly tripping, it indicates a dire need for service on the fireside.
The Lennox g51mp pressure switch repair could be as simple as a good cleaning and fuel pressure adjustment. But sometimes, it most probably has a cracked heat exchanger and may require replacement.
Most furnaces have cracked heat exchangers after five years of operation. The crack may not be in a spot that can create a dangerous situation, but they spread fast. If it’s cracked in such a position that it is blowing forced air onto the burners, it is a dangerous situation and needs to be addressed immediately.
Another Lennox g51mp problem is the burner won’t ignite even the furnace is ON. It indicates that one of two limit switches is open.
The primary limit is located on the front panel, above the main burners. If this switch is open, you will need a new one; they are not resettable in the field. The secondary limit is harder to get to and is usually a manual reset switch.
If the furnace is installed horizontal and has a dirty filter, your Lennox g51mp may be tripped. It is located on the backside of the main blower. You have to open the blower door to access it. Just follow the two wires that lead to it. Press that small red button to reset the furnace.
If none of these troubleshooting Lennox g51mp pressure switch steps work, call a professional HVAC technician. Scheduling routine maintenance is a sure way to ensure the operation of your furnace at an optimal level. These routine check-ups also help to identify small Lennox furnace problems before they turn into major issues.