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Furnace starts to cycle then turns off both propane tanks…

Customer Question
Furnace starts to cycle...

Furnace starts to cycle then turns off both propane tanks full

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Its a fifth wheel & yes we are plugged into 50 amp servi ce

Mechanic's Assistant: What is the model of your '50 RV?

Forest river cardinal

Mechanic's Assistant: Are you fixing your RV yourself? What have you tried so far?

Switching propane over not sure what else to do

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I checked the fuse box to see if its been tripped ok

Submitted: 10 months ago.Category: RV
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Answered in 8 minutes by:
10/4/2017
RV Mechanic: Randall, RVIA Certification replied 10 months ago
Randall
Randall, RVIA Certification
Category: RV
Satisfied Customers: 14,660
Experience: RVDA/RVIA Master Certified Technician with many years experience.
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Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.

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RV Mechanic: Randall, RVIA Certification replied 10 months ago

T​hat may be a low working pressure issue at the tank regulator or even the control board. The working pressure should be checked at least once a year. If you can get back to me with the make and model of your furnace I can supply a manual and direct you in some testing to arrive at the correct solution. All follow ups are included in our one time fee. No time limit.

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Customer reply replied 10 months ago
suburban not sure model but manual says sf-20Q, sf-25Q, sf-30Q, sf-35Q or sf-42Q
RV Mechanic: Randall, RVIA Certification replied 10 months ago

Do you have an outside inspection cover over the furnace or not? If so, this is easier to get to the control board if the LP pressure isn't the cause. If not, the furnace has to be pulled out from inside and the board checked that way. See the attached link to the Service Manual for this model. Print this out so you have it. http://bryantrv.com/docs2/docs/SFseriesservice.pdf

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RV Mechanic: Randall, RVIA Certification replied 10 months ago

Another helpful manual link. http://bryantrv.com/docs2/docs/subntnew.pdf

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Customer reply replied 10 months ago
is this inside the coach? should I be calling a professional to do this?
RV Mechanic: Randall, RVIA Certification replied 10 months ago

You can probably take the regulator off and into a shop to be adjusted, but removing the furnace isn't always easy unless you are handy with tools. If you have an outside inspection cover over the furnace the access to the control board is not hard. Then it can easily removed for testing. You might want to consider getting a mobile tech in the area to assist you. Most RV parks can recommend at least one. Let me know if you need more here from me.

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