We have a nordyne mobile home furnace. Can hear it click on, but it is not igniting or blowing any heat. There is a red light blinking 3 times on a box that says "united technologies electronic controls". Can you help, please? It is cold in here.

here is you problem.

Pressure Switch Closed with Inducer On = 3 blinks

Drain water from pressure switch tube if present.

Could also be pressure switch.