Please help

My furnace is not working and I know very little about it.. I was told it does not have pilot but has an ignitor... I turned it on yesterday but it didn't come on.. There is a glass mirror on the door that has a red light in it.. The red light brinks rapidly so I know it has power but nothing works.. Any advise would be great help. Thank you

What is the maker of the furnace, and how many flashes does the little red light do?

Make, year, and efficiency please. A model number may help but there are so many furnaces out there, books are at work and I do this from home.

Hi,

My furnace is a Goodman brand model no. u-29 rev-a
The red light blink continuously. I looked on the panel and found a troubleshooting quide. It says with light blink rapid continuous means incorrect twinning or incorrect primary polarity. Must check reverse transformer, secondary leads or reverse primary wires. I don't know what all these mean. Should I contact a service man.. :confused: Thanks for all the helps..