What causes ignition lockout on a boiler?

A boiler lockout is a shut-down procedure that is initiated when a boiler is not working within certain tolerances. This could be due to low/high water pressure, lack of or no fuel supply (gas, LPG or oil), a blockage in the system or lack of power to electronic components.

What happens when a metal halide lamp is started?

The particular mixture of metal halides influences the correlated color temperature and intensity (making the light more blue or red, for example). When started, the argon gas in the lamp is ionized first, which helps to maintain the arc across the two electrodes with the applied starting voltage.

What to do if the oil warning lamp is on?

If the OIL WARNING LAMP is on, shut the engine off immediately. Running the engine low on oil can cause serious damage to the bearings, rings and valvetrain. If the TEMPERATURE WARNING LAMP is on, shut the engine off immediately.

What does it mean when temperature warning lamp is on?

If the TEMPERATURE WARNING LAMP is on, shut the engine off immediately. The engine is overheating possibly due to a coolant leak, low coolant level, bad thermostat, failed fan motor or fan clutch, broken belt or radiator obstruction.

What does negative resistance mean in a metal halide lamp?

The electric arc in metal-halide lamps, as in all gas discharge lamps has a negative resistance property; meaning that as the current through the bulb increases, the voltage across it decreases.

What to do if recessed light bulb overheats?

If your recessed lighting is overheating, the lights will shut off automatically, coming back on again once they’ve cooled off. If this happens in your home, do not use the lights again until they’ve been inspected by a qualified electrician or electrical inspector. A fixture can overheat if its light bulb has a wattage that’s too high.

What happens when recessed light fixture gets too hot?

All Underwriters Laboratory-approved recessed light fixtures have a thermal protection switch built into them. This device will turn off the light if the temperature inside the fixture gets too hot. If your recessed lighting is overheating, the lights will shut off automatically, coming back on again once they’ve cooled off.

What to do when your water heater is tripping its reset button?

There are a few types of problems that can cause your water heater to overheat the water in the tank, and when that happens, the emergency cut off (ECO) kicks in to shut down the appliance completely. To reset it, you’ll need to press the red reset button on the ECO, which is usually attached to the upper thermostat.