(800) 853-2651
SHOP NOW

Odd Baseboard electric heat thermostat.

T

TimWafer

Member
Just had a customer come in with something I'm not familiar with. It was a wall mount thermostat for a 110V baseboard electric heater. It had the 2 line voltage connections marked line & load like I'm familiar with.
Additionally it also had a 12 gauge white wire coming out the side of it and also two small, like maybe 20 gauge wires hooked to it like on a 12/24V thermostat.
What are these additional wires for? I saw no unusual features on the thermostat. Had me stumped.
 

Check resistance on the wires and turn the dial to engage / disengage the thermostat, if they close (short) or open (infinite resistance) then it is an auxiliary relay. It is not common on that style of thermostat but sometimes has them to start a fan to cool off the heating element.
 

Unfortunately he destroyed it removing it and i no longer have it in my possession anyways. I asked if there was any fan of any kind on the heater and he said "no, just a simple small baseboard heater".
It was an Emerson thermostat series TC111. I found nothing like it online.
 
Is there a manufacturers name and model on it?

If so, search it, there may be an explanation and wiring diagram.

Were the extra wires in use? If not, a standard line voltage thermostat should work.
 
It was an Emerson thermostat series TC111. I found nothing like it online. All wires were connected and disappeared into the wall from his picture. No idea where they went however. Thermostat appeared old. He though maybe from 1980 or so.
 

Dont understand what you mean by that. There is no transformer there at all. the small wires definitely were hooked to the thermostat.
 
They could be for a remote temp sensor that monitored the room temperature from a remote thermocouple type device, this would alloe the thermostat to be placed
where convenient to the AC circuit, but away from the desired sensing location. Jim
 
the two small wires are connected to a very small resistor connected to the line voltage within the stat.
this resistor fooled the thermosat to think the room tempeture was satisfied minus 1.5 degrees F.the
resedual heat within the baseboards element brought the room to the required tempeture setting
 
Every baseboard heater I've seen has a high limit thermostat, usually a wire running the length of the element, to prevent an overheat. The extra wires could be for
that.
 
(quoted from post at 04:59:24 10/20/21) Pic please.
Never seen 20 g wire attached to thermostat.
Click to expand...

As Ive said I no longer have this particular thermostat in my possession. However 18-20 gauge wire is very common on low voltage thermostats. We sell lots of it. This one is a line voltage thermostat however and Ive never run into the additional small wires attached to one of those.
 
quote: They could be for a remote temp sensor that monitored the room temperature from a remote thermocouple type device, this would alloe the thermostat to be placed
where convenient to the AC circuit, but away from the desired sensing location. Jim



This sounds plausible. I asked him that if he finds anyone who knew for sure what it was to come back and tell us.

This post was edited by TimWafer on 10/20/2021 at 06:03 am.
 
(quoted from post at 02:55:35 10/20/21) the two small wires are connected to a very small resistor connected to the line voltage within the stat.
this resistor fooled the thermosat to think the room tempeture was satisfied minus 1.5 degrees F.the
resedual heat within the baseboards element brought the room to the required tempeture setting
Click to expand...

Hmmmm? Where would the resistor be located? in the heater? remotely? Just wondering where the wires led to from the thermostat. :?
 
You must log in or register to reply here.

Similar threads

G
Thermostat on an early 1954 John Deere Model 70
Replies
19
Views
989
Brownie450
B
S
Need help with MF 230 Gauges
Replies
3
Views
590
Jim.ME
J
T
Tale of two,Positive Grnd
Replies
6
Views
499
JMOR
J
R
More JD 70 Pony Motor Frustration
Replies
14
Views
964
Blksmok
B
R
New Member looking for help with NAA thermostat mystery
Replies
4
Views
1K
Royse
R
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top