I HAVE A MARCO GAS FIRE PLACE MOD #794054 IT WILL WORK FOR ABOUT 3 MIN AND TURN OFF I CAN NOT FIND PARTS OR HELP HOW TO FIX

Try the manufactures website

This company is out of business due to massive government recall. I could not find a manual online for you.
CPSC Marco Alert Consumers to Gas Fireplace Recall Due to Fire Hazard

Fireplace Pilot Light Tutorial - YouTube

? 5:06
https://www.youtube.com/watch?v=Moa7eGlKCr4
Nov 12, 2012 - Uploaded by FogoFox
This video walks you through the process of turning on the gas to your fireplace, lighting ... Lighting a Gas ...

The thermocouple compared to the thermopile. - YouTube

? 6:01
https://www.youtube.com/watch?v=dRjX5m0zHUU
Oct 16, 2013 - Uploaded by grayfurnaceman
I got an 1980 gas fireplace, I just see the pilot and something that look more ... My land lord purchased a ...

Marco Natural Gas Fireplace (Model B36CFI) won't turn on ...

Download MARCO GAS FIREPLACE MANUAL PDF ...

? 0:16
https://www.youtube.com/watch?v=lJyHdPywr0M
Jul 31, 2015 - Uploaded by Roscoe Sikes
Download MARCO GAS FIREPLACE MANUAL PDF ... How to Safely Light Your Pilot on Your Gas Fireplace ...

check gas pressure if you are useing other gas appliances could be stealing from fire place check with gas company

Dan Webster's pilot fix worked. Pilot now is blue and stays lit. Main burner still does not fire, so next step is new thermocouple.

Hello,
Your dryer is heated by gas and what is happening is,when the coils that open the gas valve work when they are cool but once the dryer is running and the gas valve coils get warm they wont work,this is pretty typical of a bad gas valve coil.Replacing the coils will fix that.To replace the gas valve coils,UNPLUG THE DRYER, use a putty knife and place in the seam between the main front panel and the small lower front panel AT the corners and depress the clip that holds small panel to main panel.On the right side of the base frame behind the small panel is the burner asm. the coils are held to the gas valve by a bracket remove that bracket and replace the coils, they are black round shaped and one has 2 wires and one has 3 wires the plugs pull off and can be push onto the new coils with just a small amount of pressure.
The part # for the coils is 279834 They can be purchased at your local appliance parts store or online at;
apdepot.com
searspartsdirect.com
repairclinic.com
appliancepartspros.com
assuredparts.com

I hope i have helped you to be able to repair your dryer,
Gene

Unfortunately, you didn't list the model number of your fireplace and whether it's vented or vent-free. However, I suspect it's vented, as MARCO (now out of business) manufactured very few vent-free models. Restoration is going to depend on the condition of the burners, as well as the gas control valve and the condition of the firebox. The small ports you mentioned, are for the Rock Wool (Glowing Embers), which are divided into small pieces (dime size) and fluffed, then placed over the small ports. MARCO did not make a vented fireplace where silica sand was used on top of the burners. Normally, you only see that on vented gas log set, that is installed in a solid fuel burning (masonry) fireplace and operated with the damper fully open.

As far as restoration parts are concerned, I seriously doubt there are any available. MARCO, as such, has been out of business for almost 10 years. Today's burners are not designed for the same configuration that you have. It wouldn't be wise to try to change the configuration, as the firebox was tested and approved for only what's in there now.

Wish I had better news for you. But, my 15 years in the hearth and home business, tells me it would difficult and costly to do.

Normally when this happens you should see Green and or white
stripes .

I know what the problem is . 2 pins under the G.P.U.
are at critical stress points and are breaking free from
the P.C. board with just the slightest heat distortion
on the board.

Fix one send it to Microsoft if its under warranty. Had to say that first.
Fix two take it to a repair shop that will re-flow the G.P.U. back to
the P.C. board. ( RECOMMENDED )

Fix Three Take your unit apart and replace the G.P.U.s
xclamp bracket with 8-32-3/8 long screw to hold down
The G.P.U. then place the fan over the C.P.U. Turn it
on and let it run for 12 min or you get two red lights
unplug it and wait 15 min Turn it on should work
but how long is the question. by the that the basic
procedures for an xclamp mod so don't waste your
money on stupid books or dvd .

Hope that was helpful
.
Rob

This an easy fix. What you must do is remove the dust from the pilot safety. I use rust buster from ace hardware to gently flush the hole. If ther is no hole just shoot a tiny drop or 2 into the pilot burner where the flame comes out. Blow it out (I use a piece of tubing). The problem is the dust drops the pilot flame to a point where it won't heat the thermocouple hot enough to jold the magnet and after 30 minutes she quits. THIS is a picture of where to clean the ODS pilots in your rig.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

I have a Model 792864B. Before you attempt to light the pilot light - make sure that any wall control switch or remote control for the fireplace is in the off position. Locate the gas supply line. There should be a gas supply valve to turn on the gas supply. The valve is usually painted a different color than the supply line like blue, green or yellow. Open the valve by pivoting the handle to be parallel to the gas line, usually counter-clockwise. When it is closed it is at a 90 degree angle from the supply line. Locate the pilot light assembly - this is the pilot light. There should also be a red or black ignitor button and a black or green valve control knob with the words "on" "off" and "pilot" on it. It may be located inside a black box, mine is marked heatolator, that has a lift off top. Lift off the top of the box. Push in the valve control knob and turn it until the word "pilot" is in line with the arrow (my arrow is red) or indicator line. While pressing and holding in the valve control knob - it presses in about 1/4", press the red or black ignitor button repeatedly (once per second) until the pilot ignites. Once the pilot is lit, continue to hold the valve knob in for about 30 seconds and then slowly release. The pilot should remain lit. If it remains lit, press in and turn the valve control knob to the "on" position. The on/off wall or remote control switch should now light your fireplace. If the pilot doesn't ignite, turn off gas supply valve, wait about 5 minutes and try it again.