Update by user Feb 29, 2020 COLONIAL GENERATOR ARE CROOKED AS THEY COME - NEVER DO BUSINESS WITH THEM UNLESS YOU ENJOY GIVING YOUR MONEY AWAY.This matter will never be truly resolved with Colonial Generators because they are thief's and lairs. They sell you everything in the world and never deliver. In a way my problems have been solved but ONLY BECAUSE of the ONAN generator company themselves. After months and months of frustration with Colonial I finally gave in and called ONAN corporate office directly. They are quite familiar with Colonial and wanted to know why Colonial installed an ONAN generator since they are NOT AUTHORIZED to do so!ONAN has had their tech Brandon (from Tampa) out here 2 times in as many weeks trying to repair the generator and it now seems that we are going to receive a NEW generator at no charge because even the factory can not figure out what Colonial did or where they got the unit from. It seems that after the install Colonial did not even notify ONAN that they had installed it which is required of the installer in order to start the warranty period (the owner is required, it is only the installer who can start the warranty) So as I said at first never do business with Colonial they are not authorized and will not do any follow up with you in any way. You would be just as far ahead if you were to just put your money in the toilet and flush it away. Find a real ONAN supplier to start with and they will take care of you from the start. Update by user Jan 30, 2020 We did not consider other companies since we had already paid for the maintenance 10 years in advance!! If I have to call ONAN I WILL HAVE TO PAY THE BILL Original review posted by user Jan 30, 2020 For weeks, I have tried calling Colonial Generators with NO RESPONSE. They did not do my 1-year maintenance that was paid for. My Generator (ONAN) that they installed last year has not worked for months and will NOT start or run in test mode at all. IT IS NOT a diesel or gas unit, it is a whole house natural gas model. So needless to say natural gas will start and there is no reason it won't. The last time they had to call in the tech from ONAN since they do not know how to fix them, they say they are OK with other brands but not with ONAN. I have made NUMEROUS CALLS to their 800 emergency call number always to get a recording asking for information and assuring they would get right back to me. Additionally, I have called their local number in Florida and ALWAYS get a busy signal and can never get through and I have tried during all regular business hours. Just to get everyone on the same page this is the same unit that I/we had to pay an attorney over $3000 to get them to finish installing after they delivered it and never returned!!! STAY AWAY FROM THIS COMPANY YOU WILL Lose MONEY (We also bought a 10-year maintenance contract...well you see what that is worth) THEY TALK A GOOD STORY BUT THEN DO NOT DELIVER!!! We are out over $16,000 dollars plus attorney fees of just over $3000.