I have the same problem but now I have no spark as well.
I have checked the volts running to the vacuum pressure switch and the thermostat and I'm getting 55v.
I have an aaladin 1000psi 120v unit.
I purchased an aaladin power washer from work about 3 years ago. The power washer started up and worked fine when I got it home.
The burner side on the other hand would not fire. I played around with the electrodes and got it to fire twice and then nothing. I called aaladin and they told me...