If you’re experiencing Weil-McLain Ultra error code e-02, there are some things that you can do to solve this problem. You can adjust the temperature on your boiler to see if it can fix the issue. You can also check the boiler after a power outage.
Resetting e-02 error code
If you receive the E-02 error code on your Weil McLain ultra boiler, you may have a faulty sensor. If this happens, you can try resetting the sensor. If the error code remains, you may need to contact Weil – McLain Technical Support for assistance.
The first step is to check if the supply/return sensor is loose or faulty. If the sensor is faulty, it may need to be replaced. If the error code remains, the status of the machine changes to LOCKOUT. A time & date line will alternate with the error message. To reset the unit, select MANUAL RESET from the Homeowner screen. You will be prompted to enter a fault name and date.
Adjusting boiler temperature
If you encounter an error code E-02 on your Weil McLain Ultra 155 boiler, the first thing to do is to check the supply/return sensor for loose links or a faulty sensor. This error occurs when the temperature rises through the boiler past a safe range, usually between 35degF and 58degF. Also, it is important to check the plumbing for trapped air, and make sure that the circulator is functioning properly.
If the control module is faulty, it will not restart automatically unless the power source is restored. The problem can be solved by replacing the control module. The resistance from the display ribbon cable to ground should be at least 50 ohms. If this is not the case, you may have a faulty Time Delay Relay.
The next step is to check the wiring diagram and make sure that the voltages of the boiler and the transformer match up. If not, the boiler will not respond to your call for heat. To check the wiring, use a multimeter or an ohm meter.
In addition to the boiler temperature, you should also check the incoming gas pressure. Make sure that the pressure is within the safe range specified on the rating label. If the pressure exceeds the safe range, you may have to replace the gas valve. In either case, you must carefully follow the maintenance procedure to fix the problem.
Checking boiler after power outage
After a power outage, check the boiler to make sure that it is still working properly. Power outages can cause problems for your gas boiler. You will not be able to use the boiler if the gas supply is cut off. Also, you need to check the pressure in the boiler system. If the pressure is low, it will affect the pressure in the rest of the house.
You should also check the other appliances that use the gas or electricity in your home to make sure that everything is still working. In addition, you should check the fuse box and power supplies. If all of these are working properly, your boiler should be functioning normally again. However, if it is still not working, you may need to call a Gas Safe engineer for a repair.
The boiler has a pressure gauge, which will tell you what pressure level it is working at. You can also check if the water level is low or high by manually feeding the boiler. If the water pressure is too low, you may need to top up the boiler to prevent it from overheating. If the water level is too high, you can try bleeding the radiators to release pressure.
You can also check the pressure relief valve or the expansion tank to see if there are any leaks. If the pressure relief valve is leaking, it is likely that sediment has accumulated in the valve seat. You should be able to detect a leaky pressure-relief valve by using a manual lever. It should discharge water for at least three seconds and snap back into its closed position. The water discharged from the valve should be relatively clean. If the water is dirty or contaminated, the valve is leaking.
Sometimes, the power to the boiler control panel has been interrupted. If this is the case, the boiler may still have power but may be inoperable. If the gas supply is working, you can try using a delay or time relay to correct the problem. If the gas supply is not functioning, you may need to contact a specialist to repair the boiler.
The thermostat controller may also be the culprit in the boiler having problems. Make sure the reset button is in the on position and the thermostat is set to a temperature above room temperature. The pressure may drop below the minimum requirements or go above the maximum recommended settings. For optimum performance, the pressure should be 1.0 to 1.5 bar. If the pressure remains low or is too high, you may need to repressurise it.
You should also check the pilot light. If the pilot light doesn’t light, you should follow the directions in the manual to reinite the pilot light. If these steps fail, you should contact a gas safe registered engineer. Older boilers have a tendency to malfunction with the pilot light. Modern systems use electronic ignition instead of a pilot light.