Furnace thermostat - Fiberglass RV
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Old 11-13-2020, 06:10 PM   #1
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Furnace thermostat

Any idea where I can find a bulb type thermostat for an old Suburban furnace
Thanks in advance Jan
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Old 11-13-2020, 06:26 PM   #2
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Buy a small digital, its better anyway.


If you really want an original,try an RV sales place.
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Old 11-13-2020, 07:24 PM   #3
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Quote:
Originally Posted by floyd View Post
Buy a small digital, its better anyway.


If you really want an original,try an RV sales place.
This is good advice. I second Floyd’s recommendation to go digital.
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Old 11-13-2020, 11:30 PM   #4
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Thanks guys for the imfo. The furnace works good it just runs continuously but then iam OK with that
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Old 11-18-2020, 08:53 PM   #5
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Does anyone have a recommendation for a particular digital thermostat? Thanks in advance.
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Old 11-18-2020, 09:48 PM   #6
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I purchased this (https://tinyurl.com/y26gq2nd) digital thermostat from Amazon for under $10. The instructions are hopeless but it works as it should.
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Old 11-18-2020, 09:50 PM   #7
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The Tekmar 518 is a very nice thermostat. Compact size with a nice full screen. High quality, good readout with selectable backlight, and it can read a second sensor and display it on the home screen. I have my second readout showing the outdoor temp.

This t-stat requires 12 volts DC, but the draw is absolutely minimal and there are no batteries. The 12 volts does not have to come from the appliance it is controlling. I think it's programmable, but I don't use that function.

Tekmar tends to be expensive, but the quality is unbeatable.

You can also got to Home Depot and find either LUX or Honeywell digital thermostats that are either programmable or non-programmable, for a lower cost. I've used a bunch of them over the years. They are OK, but not the same quality.
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Old 11-18-2020, 10:05 PM   #8
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It's hard to enthuse over a thermostat. I installed this Honeywell. Easy to install and to use. It's non-programmable, simple and works.
I don't have air conditioner. If you do and want to integrate it, you'll need to do more research.
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Old 11-19-2020, 05:20 PM   #9
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I have no power to my furnace so I don't see how any of these would work
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Old 11-19-2020, 07:07 PM   #10
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Quote:
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I have no power to my furnace so I don't see how any of these would work
Jan, do you have the type that simply turns the flame up or down, based on the furnace temp, and not room temp?

How do you turn yours off and on? With a gas knob, or a wall thermostat?
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Old 11-20-2020, 08:40 AM   #11
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Jan can you post a picture of your furnace control, or a model number?

does it look something like this?

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Old 11-20-2020, 11:08 AM   #12
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I will post pictures later today
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Old 11-20-2020, 12:19 PM   #13
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Left knob is lighting right knob is temp control. Bulb thermostat does not appear to work
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Old 11-20-2020, 01:41 PM   #14
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Quote:
Originally Posted by Jan Dyke View Post
Left knob is lighting right knob is temp control. Bulb thermostat does not appear to work
Jan, that is a Wagon Master furnace. The bulb that you are looking for is an integral part of the gas valve. So what you need is a new gas valve. There are current versions of that style of valve, but the ports are in different locations. This means some tube bending will be require to fit it into your furnace. Probably your best bet is to find a second hand furnace that uses the same valve.

This may work as a replacement:
https://www.grainger.ca/en/product/G...H/p/RSC710-205
I believe this the valve that Outback/Trillium installed in my furnace.

ON EDIT: Do not use the valve in the link above. I have been doing some research. That valve dosn't have a thermocouple input for loss of flame detection. The appropiate valve is this one:
https://www.grainger.ca/en/product/G...T/p/RSC710-201
At $393.21 (Cdn), it is WAY more expensive!

It is also available here:
https://www.supplyhouse.com/Robertsh...w-18-Capillary
$213.99 (USd), which is aprox. $293 (Cdn)

There are several threads that may be of interest:
https://www.fiberglassrv.com/forums/...tml#post139049
https://www.fiberglassrv.com/forums/...you-58565.html
Don't take the title too seriously. If it vents the exhaust gas to the outside, it is better than a Mr. Heater.
https://www.fiberglassrv.com/forums/...ace-32367.html
https://www.fiberglassrv.com/forums/...ace-49643.html
https://www.fiberglassrv.com/forums/...est-29738.html
https://www.fiberglassrv.com/forums/...art-85184.html
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Old 11-21-2020, 11:29 AM   #15
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Thanks David. It does work not too bad. If I replace it it will probably be with a diesel heater
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