Frigidair package unit not heating up, blower always on
Hi all, I have a Frigidaire package unit heater/air conditioner and my heat does not work suddenly. All was fine until the night before thanksgiving I came home and the house was down to 63 degrees and the vents were blowing cold air!! The model number of my unit is R4GA-036K072C and apparently it is made by Nordyne. I have tried already changing the ignitor, careful not to touch it, as I had read in one of the forums this is usually the problem, but even the new one does not glow. The original ignitor ohmed out at 176 ohms, while the new one ohms out at about 60 ohms. I have checked the fuses, and they are fine. I have checked for voltages at the step down transformer and they are all there. I have also checked the voltages on the colored wires coming back from the thermistat and they are as follows. Red to yellow 27.5v, red to green 27.5v, and red to white 0v. I am told that there is some safety stuff that must be happy to make heat, and would like to know is there a testing procedure for these things? Like the flame rollout switch and the temp probe, and pressure switch? When observing its operation from outside with the panel off, when I apply power the red status light is on solid for about 3 seconds, then something clicks, and the status light starts blinking about once every second, or second and a half. The exhaust fan is running, and the blower motor stays on and never no matter how I try does it shut off. The only way to stop the blower is to pull the breaker. I have been unable to find any useful documentation, and it is getting very cold in here, any help would be greatly appreciated...