Vermont Castings Merrimack

I have had my Merrimack for about 14 mos. Has been working great and we love it. Last nite the blower stopped working. The intake was really clogged and we unclogged it and it still doesn't work. The manufacturer never said anything about cleaning the intake in the owners manual. We ordered a new blower fan, it will take 2-4 weeks to arrive. Has anyone replaced one themselves? How hard is it? I tried taking off the lower grate to get to the fan motor, but the screws are in so tight and I don't want to strip them. Has anyone had this issue before?

Hi Blackdog,

I'm sure you already replaced your blower/fans.
Those two phillips head screws (behind each magnetic door) that hold on the lower grate do come from the factory fairly tight.

For others.....make sure you use a good sized Phillips screwdriver to fit the head properly.
Stripping those heads is not an option and would really stink.

I take my lower grate off every month or so to give the fans a good vacuum cleaning.

Other than that...the blower assembly is simple to remove/replace.

how is everyone dealing with fan noise these days??? i know it used to be a problems a few years back but i can't seem to find any info about current fans...if there was a fix..or if it's still a problem. i'm down to either a VS Merrimack or a Jotul C550 for our new house...and i've got to make a decision by April 29th when we close on the house.

i'm still torn...love both stoves...but that fan noise would drive me nuts if it's as loud as everyone says it is.

Riggs,
Hi, welcome to the forum. We had a Merrimack installed about a month and a half ago and love it. The fan is a variable speed fan and is quiet even when turned up 3/4 to top speed (we usually run it at about 1/3-1/2 speed and it really throws the heat). The view to the fire is huge and beautiful. In the first month we saved a little over $300 off our heating bill and we loved the nice dry heat. Since we started using the stove we have stopped using our open fireplace. I'm sure either stove will be a great investment for you and give you great warmth for years.
Mike

The Jotul 550 and Merrimack were my two final choices. I liked the look of the Jotul better, but the Merrimack won for 3 reasons.
1. The mantel clearances were shorter for the Merrimack since it protrudes a bit. Otherwise, I would have had to redo my mantel if I went with the Jotul.
2. The firebox on the Merrimack allows you to load East/West and North/South. North/South loading is a big bonus imho.
3. The Merrimack is bigger and can hold more wood. Bigger is better in my opinion.

My Merrimack had a March 2012 date on it. I don't know if VC ever did anything to quiet the fans or not.
I did not have the LOUD fans that others have mentioned, but I would get a vibration from them when the stove got real hot.
In my case, it was a very easy fix. I just added some door gasket under the blower assembly and some insulation tucked in to some other metal on metal locations.
I typically keep my fans on full blast and you can definitely hear them, but the stove room is also our TV/family room and it's fine.
If I put the fans on 50% or lower, they are dang near silent.....especially with the TV on.

Here's what I did to eliminate the vibration that would happen occasionally at high stove temps.

Thanks dsheehan, awesome review. Sort of what I was looking for. What sort of warranty does the merrimack come with? Parts and service or just parts? Also...if you dont mind my asking...what did you pay for the unit?

The warranty info is on the last page of the manual.
http://literature.mhsc.com/vermont_castings/manuals/30004671_Merrimack_6.pdf

I paid $4600 installed. $280 of that was tax. So, just over $4300.
Stainless liner, cap, damper blockoff plate, electrical outlet install inside fireplace firebox.

I bought mine in December though. You can most likely do better now.

just some info about the Merrimack i figured i'd share....since i've been tearing up the net searching for reviews.

ok so i just spoke with a local store owner in my area that has a very solid reputation...and she carries VC, Jotul, Avalon, Mendota and a few other manufacturers...and i figured i'd share our conversation and what she told me and why i've decided to go with the Jotul C550 over the VC Merrimack. now keep in mind...she sells both and services both..and has been a VC dealer for over 25 years. when i asked her about her thoughts between the two models..she said hands down go with the Jotul...and her biggest concern was customer service and parts/maintanance. she said for every replacement part she orders for the Jotul stoves...she orders between 8-10 parts for VC. she noted that Monesson just isn't using quality parts inside the stoves anymore to control costs. she did confirm that the castings are still made in Vermont...but that the parts are low dollar cost efficient and just not holding up very long and maintanance is costly on the VC units. she mentioned she was really sad about the whole thing because VC is the company she got started with and without them..she noted that her company would NOT be what it is today. she also mentioned that a lot of the time they had to go above and beyond to service customers when VC would not help...and they did this to keep the customer and do the right thing even though VC would not step in. she noted that the customer service and warrenty behind the Jotul stoves is top notch and that they just make as really solid stove and she's had great success with them.

so that's the story that pulled everything together for me. she did say she's had a handful of customers that have Merrimacks and other VC stoves/inserts and that they have ZERO problems and are thrilled with the stove. but unfortunately...it's a small percentage of her VC customers that are happy. it seems if you end up needing any support....that's when things get hairy.

hope this helps...

riggs

Hi Riggs,

That could all be true....or she was simply trying to sell the Jotul 550 she had in stock in the back room.

Either way, good luck with it.

Possibly...but I have to order the Jotul...she had 2 Merrimacks in inventory and one on the floor :/

I'm definetely not trying to piss in anyone's Cheerios...and I know there are some very happy VC owners out there...a few of which are my best friends. There is just an odd trend im seeing, which is people steering clear of VC becuase of customer service and shoddy manufacturing of internal parts...it's just popping up all the time... And that many people cannot ALL be wrong.

The Jotul is a great looking east/west stove.
Good luck with it!

you have no idea how badly i wanted that merrimack for the reason of the big firebox and just being able to shove a huge pile of wood into it just totally terrified of bad service...with my luck..i'd be the guy who has problems

i had also looked at the hearthstone Clydsdale...just because it's such a huge firebox...guess the 550 will have to do.

dsheehan56 said:

The Jotul 550 and Merrimack were my two final choices. I liked the look of the Jotul better, but the Merrimack won for 3 reasons.
1. The mantel clearances were shorter for the Merrimack since it protrudes a bit. Otherwise, I would have had to redo my mantel if I went with the Jotul.
2. The firebox on the Merrimack allows you to load East/West and North/South. North/South loading is a big bonus imho.
3. The Merrimack is bigger and can hold more wood. Bigger is better in my opinion.

My Merrimack had a March 2012 date on it. I don't know if VC ever did anything to quiet the fans or not.
I did not have the LOUD fans that others have mentioned, but I would get a vibration from them when the stove got real hot.
In my case, it was a very easy fix. I just added some door gasket under the blower assembly and some insulation tucked in to some other metal on metal locations.
I typically keep my fans on full blast and you can definitely hear them, but the stove room is also our TV/family room and it's fine.
If I put the fans on 50% or lower, they are dang near silent.....especially with the TV on.

Here's what I did to eliminate the vibration that would happen occasionally at high stove temps.

View attachment 97152
View attachment 97153

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You should send the diagram to the manufacturer along with a invoice for consulting services.

just signed a deal for a Merrimack today, lots of good info here, I hope it's reliable.

darkz71 said:

just signed a deal for a Merrimack today, lots of good info here, I hope it's reliable.

Click to expand...

I have the montpelier,the medium size insert, so far so good for me....

Not sure if anyone is still monitoring this thread. I am looking to buy a VC Merrimack in the Boston area. I was wondering how much it cost currently in the area.

dsheehan56 where did you buy your stove from?

Thanks Khu

I've had the Merrimack for about 3 years now and I've been on a mission to be able to open the doors with a fire going and not have smoke roll out. This year I insulated my 23 foot 6 inch stainless flue with 1/2 inch aluminum silicate wool. Thinking that perhaps I am not getting enough draft. So I bought the thickest most insulative material I could at a price of for the whole kit, $220. Results with the fan off, lever to the left, open the doors slowly, and when both doors are about 4 inches open the smoke is in a dead even battle to escape past the fresh air going in. Maybe my house was too tight, so I ducted fresh air pipes through the back of the chimney, drilled holes in the side of the unit itself in a space just to the side of the electric cord panel and piped fresh air to the two holes using flexable copper pipe. It is nice that I'm using outside air to combust instead of air I've paid in some way to already heat. But that had little effect on the smoke problem. I guess I will go back to what I've been doing the last 3 years and wait till the fire has gone down to red coals before I add more wood. I think the box may be too big for the 6 inch flue in some cases where good draw is on the edge. My friend has an old insert and when he opens the door after about 10 seconds it sounds like a jet engine taking off his builds so much draft. He and I put in the same stuff as in his and it is frustrating that we have such different results. Maybe my seal at the top of the insert to the flue pipe is leaking. I may put a fresh rope in and try that.
I fixed the fan noise by placing rubber tubes under the fan to keep it from vibrating.
I replaced the door gaskets after 3 years. Works like new again.
I replaced the fan once after 2 years. Fan motor seized. Ash in the motor I think.
I stack my wood in the back and when the fire matures I add wood all the way up to the reburn tubes and to the metal bar in the front. Ash sometimes spills over the bar when opening the door. Make sure this ash doesn't get sucked up by the fan. I think that is what killed my first one. Vaccum out the motor every year. It gets coated with ash and makes the bearings go out.
Take the temp sensor out! Connect the wires that fed into the sensor and you will have control of the fan and not have to wait for it to come on.
Wood moisture made a huge difference. Dry wood <20% only on this unit. >20% and reburn doesn't work, window gets black, and creosote can form. Buy a cheap meter and cut a log of yours in half. measure from the fresh cut.

Here are my fan comments

I have put rubber under the metal to metals and it does not help much. This is just a weak attempt from Vermont Casting to fix the problem. I have taken the fan out and run it on full speed. With the fan out of the unit there is not much noise. So the problem lies in the sheet metal duct work. I think the fan is trying to push air through undersized ductwork creating turbulence or back pressure, that is why when you back down the speed the noise is reduced (ductwork size is ok for reduced cfm). Any HVAC tech or Engineers that can comment on my conclusion (undersized ductwork).

Now the comment that humidity in the air eliminates the noise is something I can't check since I don't have a humidifier but that is an interesting comment since my noise increased as the fire gets hotter.

Regarding the intake screens getting clogged I just take mine off

I'm sorry to hear your having problems with the fan, mine will sometimes vibrate metal on metal and I just push the round housing a bit and the noise goes away, other that that I have no issues so far......

I started getting the vibration/jackhammer sound from the fan and found the source.
The sheetmetal that the blower mounts to is the culprit.
In the picture below you can see the brace that vibrates against the sheetmetal floor.

The brace is a punchout that swings down to support the ductwork.
Since it is a punchout from above it simply rests on the sheetmetal floor.
Stick something under it to eliminate the metal on metal and the vibration/jackhammer sound is gone.

Hope this helps someone else. That noise was ridiculous.

I have been reading where some people talk of having the insert mounted to the stove from the inside of the insert. My installer never did this, and this is a pain...here is why. The smoke stack on top of the chimney has two screws, that look exactly alike, if you take off the wrong one (the correct one removes the top of the stack for liner cleaning) it release the insert to spring up and disconnect from the insert. This is a pain as you need two people to fix it, one reaching up from inside the stove to feel if it's "right", the other to lift up and down on the liner.

My question is this. How does it mount to the insert? Do you have to pre-drill holes for the screws to sink into the insert? It's cast isn't it?, seems like that would be really hard, or do you do it a different way? Any info about this would really help - Thanks

Should have the Merrimack installed in a couple weeks. How's everyone feeling about it now that it's been around nearly a decade?

therealdbeau said:

Should have the Merrimack installed in a couple weeks. How's everyone feeling about it now that it's been around nearly a decade?

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We still love ours. Still learning techniques to help run the stove better. No problems or complaints so far, and we've had it in operation since November 2015.

I think the reason why the sheet metal vibrates as shown in dsheehan56 picture a few post above is the fan is starving for air causing an increase in velocity of the little air it gets. When I remove the bottom intake cast iron piece (as shown in dsheehan56 pic) and run the fan on high there is little to no vibration. But when i put the bottom intake cast iron piece back it vibrates, rattle, jack hammer noise. This is why people post if you run the fan at 80% +/- the rattle/noise goes away. i.e. It is not starving for air since it only needs 80%.

If I lay a tower fan horizontal and have the intake installed and push air to the Vermont blower with the tower fan (like a 2 stage system) it also stops the jackhammer noise.

Now i am going to try dsheehan idea.

My unit is about 7 years old. Has Vermont not fixed this problem?

Vermont solution "rubber under the fan center support" has never worked.