Heating Not Working

Hi Guys

We let our oil tank run pretty low with oil and havent used if for about two weeks, we got a delivery of oil today and after turning on the heating switch, the heat wont come on any ideas?

When we turned the switch on in the past you would hear the boiler make a noise but when we turn it on now nothing.

Thanks for any advice

Is the reset light on the burner glowing red? If so, press it. Burner should attempt to light. You may need to bleed oil line.