stuck fireplace damper

Hello, I want to get our fireplace in working condition and wonder if anyone could comment on the following questions:

(a) The fireplace has a damper that stuck in the half-open position. It's somewhat bent too. Understandably, I at least want to be able to close it to minimize heat loss. Can I just straighten it up and apply WD-40 for several days to get it moving? Or should I think about replacing it by a professional? The picture below is looking up.

(b) Not sure when was the last time the previous owners serviced the fireplace. If I have to hire a professional, what charge should I expect for a basic check-up and cleaning?

Would greatly appreciate any feedback and references to resources on fireplace maintenance.

Best wishes,
h.

 

First thing you should do, especially if the house is not to you is have a chimney company inspect the fireplace and chimney and give you their opinion.

Personally, I'd remove that damper and put a lock top chimney cap on. They are much better at sealing the chimney when it's not in use then that tired damper will ever be.

 

Thanks for all the responses! I'm thinking of removing the old damper and installing a top lock chimney damper instead of the current spark arrest, as suggested. Was wondering about what brands/models should I check first, the ones that provide a good seal and won't break in two weeks? The top of the clay flue is a rectangle 13-1/2" by 9". Thanks and Best Wishes, h.