Calling a reputable contractor is the easiest/best method, unless you have other plans not mentioned here.
u dont you buy a new furnace
One can buy a Honeywell furnace by visiting the Honeywell website and purchasing one there. There are a few questions to help a customer determine the best furnace to fit that customer's needs.
You could do some research on the furnace and who might install it and find someone who will do that thing. You can buy one at a local store if they sell it and if they install it.
My electric furnace has suddenly stopped working. Where can I buy a new one?
A furnace humidifier can be bought from Amazon or Ebay. It can also be bought or ordered in from good hardware stores that stock supplies of furnace equipment.
There are many retail stores that you can buy a furnace from, such as Canadian Tire, Home Depot, Walmart or Target. There are also online retail stores where you could order a portable furnace from. The advantage of buying online is that you can easily read other customers' reviews before you buy.
i have a mobile unit want to buy a nordyne eletric furnace 17kw 57000 btu model e3eb-017 240/1ph
Yes you can
At http://www.nextag.com/where-to-buy-furnace-oil/products-html you can compare prices for oil furnaces, to help you make a decision that is right for you and your pocket.
No, you should replace the valve.
That will depend entirely upon the type of furnace you have. There are filter less furnaces, so if you have one, you won't need filters. Otherwise, if your furnace requires a filter, you will need to purchase filters and replace them regularly. If you have the owners manual, that will tell you if the furnace needs a filter.
When looking to buy a new furnace, take into consideration the design and complication of the product as if it seems to be too complex then this could result in an accident when trying to use it. Also, take into consideration the condition of the furnace as if it is not very good then this could also lead to health and safety issues.