Since its a website that we all work on, speaking to all webmasters. We tend to focus on the "is it me" or just overlooked error's etc.. sometimes stepping back or away from it even
We've been down this road many times and all types of situations come up. Some things come to mind, I don't know details some of my questions will not apply.
1. Is this a new site or existing?
-- if new, get relative back links using different keywords to link to the site.
-- a rebuild site, then it took google a while to catch up but if you changed the names of the old pages and replaced with new and moved content around. Huge dip in the road expected.
2. Text is a factor regardless of the background. White and shades of white are pretty much ignored from my last recall on that subject.
3. No sandbox.. I can prove that. We created a complete flash site and within 3 weeks it was live and responding to keyword searches. Google can now read and index flash sites and it's Amazing!! ( Your site is not flash, so it's something else )
4. Some basic things have been overlooked..
-- alt tags for example:
* "Brochure Request Icon" More like, "Request A Free Brochure"
-- browser title at top is missing additional keywords
* To have the company name only is too little and loosing power in results. Should mention top three products or something.
-- <meta name="keywords" content="put more in here" />
* It's one thing to focus on heat pumps, but I'd place more relevant words with these.
-- <meta name="description" "spam" repeating heat pumps too many times. Almost boring to read. This would be the place where you're at a bar and someone ask.. hey, what do you do for a living? " We offer this... " don't leave anything out and don't bore them
-- Home page paragraph.
* Add a couple of more structured paragraphs. Make one like general info about what's here. Then other 3 paragraphs to break those top three down into sections of information. Just don't be spammie about it.
Other things..
The news articles need unique titles in the browser other than "News Articles" can it not be specific? "Heat Pumps, the Real Benefits"
The big blocks of white space in left and center area lower tend to be common everywhere. Tighten that up somewhat.
Hope something here helps, just a quick scan for you and others to think about