What's wrong with this gas dryer igniter?

[MachineHack]

My aunt wants me to help her with her gas dryer. It's got this weird thing going on with the igniter.

Sometimes it's barely there for like two seconds, just a faint glow. Other times, it'll hang in there for maybe seven seconds and get pretty hot, and sometimes it even flickers the burner to life for a sec.

But then, bam, power cuts out and the flame goes poof if it even started.

I've checked, and I think the dryer was clogged, and it blew the high limit.

I swapped that out, but still no heat. Then I changed the control fuse and the thermistors, checked all the thermal fuses – they're good. Realized the igniter was kaput and replaced that. Flame sensor seems to be doing its job too. does anyone know which other part to check? TIA for the advice and insights

 

[ToastAndBoast]

It might be the gas coils acting up. When they get worn out, they can cause the problems you're having. I'd reccommend replacing them first and see if that fixes the issue. Keep us updaetd on what you find

 

[Simon.day]

You've already covered a lot of the right base, check the gas valve coils still

 

[solo.shifter]

But actually @MachineHack , the gas valve coils are cheap, easy to replace, and should've been swapped before the thermistors if I'm being honest, pop them out and try again and if that doesn't fix it, then start looking at wiring or control board issues

 

[bottomoftheocean]

Yh I kinda agree with @solo.shifter . Also check all connections and voltage at the igniter circuit.

 

[Pboycents]

Funny how my grandpa had this exact issue one time when I went visiting. Our coils had completely worn out and was barely functional. Anyway, my grandpa took care of that but I just thought I'd chip on this