Repair and service of a vulcan central heating system

Joe requested 3 quotes from Heating Professionals in Berkeley

vulcan model 5012205/a

Gas heater (Bowin Quickheat Lo max) goes on for a short while then off!
My above Bowin gas heter, gow on for a little while then off. We then need to...

Rennai 2001 model fake wood heater need repairing
heater will click and turn on however will not stay on.

Vulcan oil heater repair
Our heater will light but wont stay alight, might be a fuel block or filter...

The flame in my vulcan oil heater does not come up.
The start light stays on for a long time and i can feel some warmth at the...