36ECMII pilot light won't light

Possible instructions, but you may need to call for gas company if gas is off, or a technician to repair a 2003 fireplace.

Be patient in attempting to light it if electric, as it may take 3 or 4 tries, and you may smell gas and see a visible spark when lighting it.

http://sundanceenergy.com/resources/blog/pilot-lighting-instructions-vermont-castings-gas-fireplaces

Plugged gas pipe which connects to the burner.

What is the model number of the unit?

DESA International aka Vanguard and other names has been out of business for about 4 years.
Several previous owners/board members formed a new company FMI LLC and bought many of the heater assets of the bankrupt DESA International. See below

FMI Products, LLC a newly formed LLC announces the purchase of all assets of the FMI contractor business (fireplace and gas logs) from the bankrupt Estate of Desa of Bowling Green, Kentucky. FMI Products will establish the Santa Ana location as its new corporate headquarters which houses a 150,000 sq. ft. manufacturing facility.

The new company also includes a 106,000 sq. ft. manufacturing facility in Russellville, Alabama. This operation will house the customer service and technical service support groups, in addition to manufacturing and distribution.

Mark Klein President & CEO of the new company states "we are excited about this new company and are confident that

with the expertise of the management and the dedicated employees we have been able to maintain,

we will be able to grow the company and become a significant force within our industry."

FMI Products uses various brand names such as FMI, Vantage Hearth, Design Dynamics, Comfort Flame, Hearthside Designs and numerous others.

Every thing built since March 23, 2009 carry a full warranty from FMI products.

All the product built prior to March 23, 2009 Carry a Desa warranty and

Desa is bankrupt and is not around to validate any warranty on the products they built. Carefully check all the "DEALS" that are out there!

Hope this helped you and thanks for choosing FixYa.

Model Number doesn't appear correctly recognized by the maker?

FMI Customer Care Center

http://fmisupport.hcents.com > manuals

Download Manual. Select the Product Type: Fireplaces, Gas Logs, Gas Stoves ... Select Model Number: Select Model Number, 3601MII, 3610ST, 3612ST ...

Installation Instructions - Allparts Equipment & Accessories

http://www.allpartsinc.com > media > attachments

PDF Models GL3000E/3100E series are radiant heat decorative ... This FMI appliance and its' approved components are safe ... FOR MODELS GL3000 & GL3100.

GL3100 FMI PRESIDENTIAL DIRECT VENT FIREPLACE ...

https://www.allpartsinc.com > fmi-presidential-direct-ve...

THIS MODEL NUMBER IS FOR REFERENCE PURPOSES ONLY. THIS UNIT IS NO LONGER BEING SOLD AS A NEW UNIT. SEE ASSOCIATED PDF MANUALS ...

FMI Products Replacement Parts - Hearthside Distributors

https://www.hearthsidedistributors.com > Catalog > Repl...

Results 1 - 45 of 2515 - How to Order 1. Click the Owner's Manual Portal below to download the parts manual. 2. ... Includes parts for the following FMI Models:

my fireplace lights up for a short time and goes out after 5 or 10 minutes, please help with this problem.

It sounds like the Ignition Control Module went out, as I've heard the vibrating noise you speak of just before the module "dies." You most likely have the gray Robertshaw control module box located under the fireplace connecting the power to the gas valve. You will need to have a Certified Gas Fireplace Specialist look into this issue and replace, if necessary.

Make sure the valve is in the ON position, if so and the burner still will not lit, then you'll need to get the thermopile replaced.

When the oven control is turned on the pilot should grow larger. If it does and it is not lighting it is the thermocouple which is part of the safety valve. If it does not grow the pilot assembly is plugged and cleaning it would be a temporary fix but the correct one is to replace the pilot assembly.
Eric

Does it have a standing pilot light? On new units, there is an igniter and not a pilot. But if you have a standing pilot, you will move the gas valve to "pilot" and push down the red button while holding a flame under the pilot located by one of the jets. Once it lights continue to hold the button down for a minute or so and then release the button. The pilot should stay lit. Then turn the dial to the on position. That's it.......... If the pilot won't stay lit then the thermocouple is bad and needs to be replaced.