Thank's Robert for that humourous input.
A little dumb understanding the comment about spider search but will give it a try.
I'll search for the manual on how to remove the orifice to see if there might be a web inside.
Will a web inside the orifice cause the burner to not come on cause it does come on & off at my demand using the thermostat controls.
Amazingly the flame like I mentioned earlier puts out a real nice flow of blue the first time I fired it up for the winter & no blue yellow mixed flame like last year.
My wife mentioned yesterday when she turned on the electronic upper gas stove burner, it blasted out a red flame.
I know a gas flame doesn't put out a red flame & thought she was silly.
Never heard of a red flame but have heard of a yellow/blue mixed flame.
I'll have to take a temp readings from the register's & back at the unit incoming air like you mentioned for me & calculate the temp measurements you told me to do a long while back on another post.
My Stepson mentioned that procedure also to me one time.
Oh! Filter is clean also.
About the RPM"s you mentioed, both motors are 1375 RPM.
One being the 1/3 hp & the 3/4 hp whitch, is in it now.
I have one sitting beside me now that's a Broad-Ocean 1/3 hp 960 RPM 240v,60 hz 2.90 amps.
The one I accedently fried wiring it up myself that put me out %150.00.
Maybe I need to go back to the 960 rpm & not a 1375 rpm.
My Stepson had mentioned, too much air flow across the chamber might cause it not to build up enough heat before the blower come's on.
Still have it attached to the old intertherm thermostat on the other end of the house & not on the Hunter digital non programmable one near the furnuce.
The blower still comes on & off at times when I turn it down to a lower temp. when I decide it's not going to heat properly.
Then I merely just turn it all they down & wait till it completes a 3-4 on/off cycle about every 2-3 seconds going off & on.
Using small radiator heaters in each room for now till I can get this resolved.
Have to purchase a few more & put in both bathrooms so the pipes don't freeze up this winter.
Winter time's not so bad right now to use the furnace, but have to be ready for the big winter blast later on you know.
I still say there's something up with the limit switch causing the blower to go on & off too much at a lower temp. I'll have to I guess dish out that $90.00 or $99.00 soon & purchase one of them from your link cause I can't find a cheaper one outside your site.
There just not availible anymore for my MGH intertherm model.
Been discontinued indefinately.
What a bummer!!
I wished I had the money to just replace the whole unit bare & reinstall the new a-coil & motor.
You wouldn't by any chance know where I could get a bare Gutted unit that would fit mine do you?
Can't find one without the a-coil but can find them without the motor.
I checked the upper stack for blockage & was ok thinking it wasn't getting enough draft flow.
The burner blue flame tells me it's ok.
No holes in the inside chamber either.
There I go again blabbing on & I'm sorry for that.
I'll keep in mind about the limit switch purchase as soon as my tax return check arrives I get a large check at work.
I guess I had mentioned a while back, i'm retiring in February, thank goodness!.
Wlll have alot of time to get the house back in shape with the remodeling & fixing all the wall outlets & floors & such all through the house.
It's falling apart all around us little by little being a 88 model Prestige 16x60 v-roof.
Take care & you & the family have a festival TG & a Merry Xmas & a Happy & Safe New Year.
Hope it's a better one than the last.
See Ya!
David
I am a certified ford diesel tech, "Retired Now" Ford Parts Department counter man, computer consultant, repairman & programmer
Well I am getting tired of the MGH Intertherm unit cycling on & off even when the correct temp is in range for it to start heating the house & the air is still cool coming out of the registers.