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tappan gas range model MPF300PBWF  Rate Topic 
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 Posted: Sat Sep 19th, 2009 10:31 pm
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llky
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This range is about 8 years old or so.The burners all work fine.The oven won't come on.It has a stand by piloet that lights the burner piloet and then is supposed to light the burner.The stand by piolet is lite,when you turn the oven on,the stand by piolet lites the burner piolet,then nothing else happens,the burner will not light.It looks to have a thermocoupler on the piolet system.I can not find any info on this range,can you guys help me.I realy need some sort of a service or repair manual.Thanks for your time.Please help.

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 Posted: Sat Sep 19th, 2009 10:46 pm
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RegUS_PatOff
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MPF300PBWF  c 1998

Is the Thermocouple positioned in the Flame OK ?

Looks like part of the Oven Saftey Valve Assembly 5303280593

click on picture


MPF300PBWF Parts List & Diagrams at SearsPartsDirect
BURNER

White / Universal / Multiflex /Tappan / Frigidaire MPF300PBWF Parts Catalog



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 Posted: Sun Sep 20th, 2009 12:33 am
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llky
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Thank you so much.Yes I think it is positioned in the flame alright,it looks like the end is burnt.From the looks of the parts in the parts catalog it looks like you may have to buy the gas valve assembly,not just the thermocoupler,is that true? Thank you ever so much

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 Posted: Sun Sep 20th, 2009 12:58 am
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RegUS_PatOff
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llky wrote: ... it looks like you may have to buy the gas valve assembly,not just the thermocoupler...
as far as I know , yes ...

5303280593 equivalent at eBay

NEW (4) available

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370127857110



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 Posted: Sun Sep 20th, 2009 01:19 am
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llky
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Thank you so much,as usual you guys always come thru.I'm so glad that I found this forum.

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 Posted: Sun Sep 20th, 2009 11:18 am
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Budget Appliance Repair
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Before you go replacing that safety valve it would be wise to do a little more testing, these valve do fail but not that often.

Most of the time on these systems the problem is a slightly plugged pilot oriface making the secondary pilot flame too small to heat the capillary bulb enough to open the valve.

Is the capillary bulb fully engulfed in the secondary pilot flame when the oven t-stat is turned on?

With the oven t-stat on and secondary pilot burning hold a bbq lighter flame under the capillary bulb to add direct heat, (keep your arm/hand down low and out of the way of the burner so you don't burn yourself if the burner comes on).

If the main burner lights with the added flame from the lighter then you  most likely just need to do some cleaning.



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 Posted: Sun Sep 20th, 2009 11:44 am
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Budget Appliance Repair wrote:

Is the capillary bulb fully engulfed in the secondary pilot flame when the oven t-stat is turned on?





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 Posted: Mon Sep 21st, 2009 01:48 pm
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llky
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Thank you so much for this great help and info.I have taken the burner off and cleaned everything fairly good,still no go.Thank you for your time and help.

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 Posted: Tue Sep 22nd, 2009 10:39 am
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Budget Appliance Repair
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llky wrote: Thank you so much for this great help and info.I have taken the burner off and cleaned everything fairly good,still no go.Thank you for your time and help.
Did you take the pilot assembly off and clean it, (use a fine sewing needle and gently probe the pilot oriface, you don't want to enlarge it just clean it out), not the main burner.



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 Posted: Tue Sep 22nd, 2009 12:07 pm
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Samurai Appliance Repair Man
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I use isopropyl alcohol and compressed air to clean out the orifices. Use a rubber-tipped nozzle attachment on the air hose so you can make a tight seal on the orifice and blast it through. 80 psi will do the trick.



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 Posted: Tue Sep 22nd, 2009 12:33 pm
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Samurai Appliance Repair Man wrote: ... 80 psi will do the trick...
just for the record, OSHA regulations (yea, I know),  restrict compressed air cleaning "guns" to 30 psi ...

Most air-gun cleaning nozzels limit the air pressure to 30 psi by design ...

" ... an air gun with a specially designed safety tip.  These guns are equipped with relief ports that reduce the pressure at the nozzle to less than 30 psi if blockage occurs."

"If the gun is “dead-ended” against the skin, compressed air can enter the body through small cuts or punctures.

Results can range from soft tissue damage to an embolism (air bubble in the bloodstream). 

Compressed air can also rupture internal organs if introduced into a body cavity... "

http://www.ehs.psu.edu/help/info_sheets/Compressed_Air_Gun_Info_Sheet.pdf



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 Posted: Thu Sep 24th, 2009 03:58 pm
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Samurai Appliance Repair Man
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Dayyam, whoda thunk all thayat? I think I misled you-- I use an air nozzle, similar to this one, not an air gun. I use it with an air tank that I charge in the morning before I head out on service calls.



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