Hi good day,
How long has it been since this unit has been professionally cleaned?
This is an very good system, and likley it may just need a cleaning and adjustment.
I think you will need to call a tech in to service this but it shouldn't cost too much because even if its a low pressure issue and it may be, its likley due to a clogged nozzle or filter, basic simple stuff for a technician-)
I have been servicing burners and boilers for over 30 years so I am pretty sure of this issue and its solution;-)
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.