Things built, torn down and other projects.(Pictures)

#2,603
#2,603
My neighbors are getting new underlayment and shingles for their roof. Visible is the hewn board decking. @Orangeslice13, I thought you might appreciate it.
IMG_2582.jpeg
Edit: They’re adding a layer of plywood decking atop the existing decking as well.
 
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#2,605
#2,605
@Orangeslice13 ! Help!!!!!

I've got a 240V baseboard heater. It has and ancient, circa 1974, thermostat. I want to replace the thermostat with a new one that has a digital display so us old folks can see it. Trouble is, the old thermostat only has two (2) 18 ga wires, one white and one red. There are no other wires available in the electrical box containing the old thermostat. When I check the voltage across the two (2) wires there's about 24V. There is no central heat/AC controller in the house, just individual baseboard heaters, each with its own thermostat.
So I bought a Honeywell TL7235A and attempted to wire that unit across the two (2) wires and got nothing. No display, no smoke, nada. Called Honeywell and they confirmed this unit needs line voltage (120V) to work.

Question: How does an old 24V thermostat control the 240V heater? There must be some kind of controller somewhere between the thermostat and the heater, but it must be hidden in the wall??????? I've confirmed that there is one (1) 12/2 cable feeding into the baseboard heater. No little 18ga wire, no other controls at that end. I'm stumped, but that ain't hard......

Any ideas or recommendations????

TIA for any and all help!
 
#2,606
#2,606
Danl said:
@Orangeslice13 ! Help!!!!!

I've got a 240V baseboard heater. It has and ancient, circa 1974, thermostat. I want to replace the thermostat with a new one that has a digital display so us old folks can see it. Trouble is, the old thermostat only has two (2) 18 ga wires, one white and one red. There are no other wires available in the electrical box containing the old thermostat. When I check the voltage across the two (2) wires there's about 24V. There is no central heat/AC controller in the house, just individual baseboard heaters, each with its own thermostat.
So I bought a Honeywell TL7235A and attempted to wire that unit across the two (2) wires and got nothing. No display, no smoke, nada. Called Honeywell and they confirmed this unit needs line voltage (120V) to work.

Question: How does an old 24V thermostat control the 240V heater? There must be some kind of controller somewhere between the thermostat and the heater, but it must be hidden in the wall??????? I've confirmed that there is one (1) 12/2 cable feeding into the baseboard heater. No little 18ga wire, no other controls at that end. I'm stumped, but that ain't hard......

Any ideas or recommendations????

TIA for any and all help!
Click to expand...
I’m about to be no help whatsoever….
The lake house I was just rehabbing had those. Half didn’t work. After talking with everyone I could think of and trying out every imaginable solution…….we ripped it all out and put in mini-splits.

You’re welcome.
 
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#2,609
#2,609
@Orangeslice13 ! Help!!!!!

I've got a 240V baseboard heater. It has and ancient, circa 1974, thermostat. I want to replace the thermostat with a new one that has a digital display so us old folks can see it. Trouble is, the old thermostat only has two (2) 18 ga wires, one white and one red. There are no other wires available in the electrical box containing the old thermostat. When I check the voltage across the two (2) wires there's about 24V. There is no central heat/AC controller in the house, just individual baseboard heaters, each with its own thermostat.
So I bought a Honeywell TL7235A and attempted to wire that unit across the two (2) wires and got nothing. No display, no smoke, nada. Called Honeywell and they confirmed this unit needs line voltage (120V) to work.

Question: How does an old 24V thermostat control the 240V heater? There must be some kind of controller somewhere between the thermostat and the heater, but it must be hidden in the wall??????? I've confirmed that there is one (1) 12/2 cable feeding into the baseboard heater. No little 18ga wire, no other controls at that end. I'm stumped, but that ain't hard......

Any ideas or recommendations????

TIA for any and all help!





Orangeslice13 said:
I’m about to be no help whatsoever….
The lake house I was just rehabbing had those. Half didn’t work. After talking with everyone I could think of and trying out every imaginable solution…….we ripped it all out and put in mini-splits.

You’re welcome.
Click to expand...
No worries! Thanks for the input. We did install some mini-splits and they're great, except we don't like the fan blowing directly on us for heat. The baseboard units were here when we took over and work just fine. SWMBO just wants a better thermostat that she can read.

I just can't figure out how a 24V thermostat can control a 240V heater without some kinda controller betwixt and between them.....
 
#2,610
#2,610
Danl said:
@Orangeslice13 ! Help!!!!!

I've got a 240V baseboard heater. It has and ancient, circa 1974, thermostat. I want to replace the thermostat with a new one that has a digital display so us old folks can see it. Trouble is, the old thermostat only has two (2) 18 ga wires, one white and one red. There are no other wires available in the electrical box containing the old thermostat. When I check the voltage across the two (2) wires there's about 24V. There is no central heat/AC controller in the house, just individual baseboard heaters, each with its own thermostat.
So I bought a Honeywell TL7235A and attempted to wire that unit across the two (2) wires and got nothing. No display, no smoke, nada. Called Honeywell and they confirmed this unit needs line voltage (120V) to work.

Question: How does an old 24V thermostat control the 240V heater? There must be some kind of controller somewhere between the thermostat and the heater, but it must be hidden in the wall??????? I've confirmed that there is one (1) 12/2 cable feeding into the baseboard heater. No little 18ga wire, no other controls at that end. I'm stumped, but that ain't hard......

Any ideas or recommendations????

TIA for any and all help!






No worries! Thanks for the input. We did install some mini-splits and they're great, except we don't like the fan blowing directly on us for heat. The baseboard units were here when we took over and work just fine. SWMBO just wants a better thermostat that she can read.

I just can't figure out how a 24V thermostat can control a 240V heater without some kinda controller betwixt and between them.....
Click to expand...
In the automotive world, low voltage controls high voltage with a relay.
 
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#2,611
#2,611
Danl said:
@Orangeslice13 ! Help!!!!!

I've got a 240V baseboard heater. It has and ancient, circa 1974, thermostat. I want to replace the thermostat with a new one that has a digital display so us old folks can see it. Trouble is, the old thermostat only has two (2) 18 ga wires, one white and one red. There are no other wires available in the electrical box containing the old thermostat. When I check the voltage across the two (2) wires there's about 24V. There is no central heat/AC controller in the house, just individual baseboard heaters, each with its own thermostat.
So I bought a Honeywell TL7235A and attempted to wire that unit across the two (2) wires and got nothing. No display, no smoke, nada. Called Honeywell and they confirmed this unit needs line voltage (120V) to work.

Question: How does an old 24V thermostat control the 240V heater? There must be some kind of controller somewhere between the thermostat and the heater, but it must be hidden in the wall??????? I've confirmed that there is one (1) 12/2 cable feeding into the baseboard heater. No little 18ga wire, no other controls at that end. I'm stumped, but that ain't hard......

Any ideas or recommendations????

TIA for any and all help!






No worries! Thanks for the input. We did install some mini-splits and they're great, except we don't like the fan blowing directly on us for heat. The baseboard units were here when we took over and work just fine. SWMBO just wants a better thermostat that she can read.

I just can't figure out how a 24V thermostat can control a 240V heater without some kinda controller betwixt and between them.....
Click to expand...
I’ve got a call out to a guy who works in old stuff like this. Clocks, thermostats, restoration type things. I’ll let you know what he says if he calls me back
 
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#2,612
#2,612
People also ask
Should I have 24 volts at the thermostat?
Power Source: Most thermostats operate on low voltage (typically 24 volts) from a transformer. While this voltage is generally safe, it can still cause a mild shock or discomfort.Jan 26, 2019
 
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#2,613
#2,613
malinoisvol said:
People also ask
Should I have 24 volts at the thermostat?
Power Source: Most thermostats operate on low voltage (typically 24 volts) from a transformer. While this voltage is generally safe, it can still cause a mild shock or discomfort.Jan 26, 2019
Click to expand...
Yep, almost all tstats work on 24v. But, almost all tstats are wired to some control board/electronics in the central hvac system. Most, but not all, baseboard heater tstats run off line voltage and are wired directly in the heater's power lines.

What I got is a 24v tstat controlling a 240v heater with no control board/electronics to be seen. Some durned, damned, dowg breath, double tawkin, two-faced, three legged, four-flushin, idjit has gone and wyred a 24v/240v relay behind the walls or under the floors somewhere!
 
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#2,615
#2,615
Wireless1 said:
Do you still have the old thermostat?
It could be a 24 v loop powered controller or it’ll be a straight impedance (essentially a rheostat) controller
Click to expand...
Yes. It's a really old mechanical type with a little ball of mercury in a tube. Just a very simple 2 wire thermostat. I gave decided to order a simple, battery powered estate that will accept only 2 wires. We'll see how it goes.
 
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