Got home last night no heater on, usually it's the pressure relay hose/metal housing intack with minteral buildup, checked all clear, turned on I hear gas coming on but no ignition, I test it 3 times after the third time finally get led light either blinking 1 time or constantly there's about a second and half dealy between beeps, 1 beep refers to pressure switch, flame sensor or hot surface ignitor, the part number on the HSI is 271N, is it acceptable if a hvac professional used a nongoodman HSI? I searched the part shows up as Norton 271N. Can I use any HSI? Were should I go from here? Buy the part 30.00$ replace? Thanks

I will check the voltage for 120 when I get back home and update, if I get 120 it will be the HSI found locally for 45.00, thanks

Anyone know the delay between the led status lights to confirm if this is 1 beep or constant beep?

From what you say it is a one blink signal you are looking at. That could be a problem with various parts. If the HSI is not glowing then that is what I would check first. CAUTION do not touch the HSI glow part with your bare hand. Oils on your fingers can cause it to expire sooner.

OK, it was the HSI ( white mark, crack), in the mean time I also replace the pressure switch all in all took about and hour after I found a small screwdriver, only cost parts 45.00 HSI 24.00 pressure switch. To all this is a very simple thing to do if you don't mind getting a little dirty, but it better then paying 350.00 for hvac guy.