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Just brought a Altech cylinder thermostat thinking it would be easy to swap with the old one but the instructions do not match with the wiring I already have. The old wires are red, yellow and blue and the new instructions have connections C 1 and 2 can anyone tell me how these match? Thanks

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Posted on Jan 02, 2017

  • 171 Answers

SOURCE: Honeywell wall thermostat

Hi,Richmart
I'm Harvey the Plumber,
First, Your question is if your thermostat is wired correctly!

Assuming that it is correct, a common problem that most people and plumbers overlook is correctly setting the heat anticipater on the thermostat.
Assuming that you have a gas central heating system, then you must simply look on the gas valve for the amp rating.
For instance,if the gas valve printing says .4 amps then set the heat anticipater for .4
It's common for the unit to turn on and off erratically (short cycling) when this setting is not correct.
If all you are worryied about is the wiring, you must look at the wireing diagram that came with the thermostat.
Further diagnoses would requie detailed information about your central heating system.
Or the alternative would be to have a hands on tech help you out.

Feel free contact me again!
Please give me a rating here at fixya.com before you sign off
Thank you,
Harvey

Posted on Sep 09, 2008

SOURCE: I have just purchased and had installed a

Should be 2 low voltage wires.Hook one to termnal(R) and one to termnal(W) at boiler.

Posted on Apr 01, 2010

  • 760 Answers

SOURCE: I just installed a new

Most water heaters heat the water on top first. This is because the warm water will rise to the top and the hot water is drawn off the top. When the upper thermostat turns the top element off then the bottom one comes on. It makes it sound like there is a problem with the top element. Disconnect electric, and read the resistance on the element terminal to terminal. If it shows open the you have a bad element. Did you make sure the heater was completely full before turning the electric? You must run the hot faucets to remove all the air from the top of the tank before turning on the electric. Elements will burn out quickly if out of the water.

Posted on Nov 09, 2010

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I have a honeywell T87K round thermostat (2-wires R and W). I just purchased a honeywell WIF 7-day programmable thermostat RTH6580WF. How do I install the new thermostat? Is it even possible?


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How To get help Turning On Your Water in titusville pa


Hi. Did the water get really hot just before the water heater tank shut off? If so, and if your water heater is electric, the temporary fix is to shut off the main, and water heater circuit breakers, (at the main electrical panel) then remove the upper cover, on the metal face of the water heater (there are two, upper and lower) Then carefully remove the insulation, and plastic thermostat cover. Underneath, there will be a large red button, located at the top of the upper thermostat. If you can see the red button through the thermostat cover, then removal is unnecessary. When pushed in, if you hear a "click" it should fire up the water heater. you will hear sizzling and popping noises to let you know it's on. Remember, this is very temporary! As this is an over temperature, (high limit switch) safety device, take replacement of the thermostats seriously ok? My suggestion may or may not be the answer you are looking for, depending on your water heater, but is standard for the majority of home residential electric water heaters.
If you attempt the replacement yourself, be sure to get the exact same, upper and lower thermostats! That way you will be sure the old wiring will reach and you wont have to replace any wires, with longer one's. The correct wiring diagrams will be on the back of the new thermostat's packaging. match up the correct diagram to your water heater, BEFORE disconnecting anything. When done, BE SURE the thermostat's are in their retainer clips, and are touching the bare tank tightly, on the backside. They cant measure temperature without contact.

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1 Answer

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1. Check and see if the thermostats are getting power.
Remove cover (access Door) Test the leads for power
2. If there is power at the thermostats try hitting the reset button on the top thermostat
3 Check and see if there is power at the element
4. To tune up your water heater is an easy job ... You can buy thermostats for less than 15 bucks and elements cost 8 dollars at lowes or home depot. Remember to kill the power when working on the unit. It is 220V It will kill you !

Disco Power
Turn water off
Drain Tank
Remove wires to Elements ( Remember to match the amps on the elements !) If they are 3500 replace with 3500 etc.
take a wrench and remove elements and install new.
next replace the thermostats wire exactly as you see them

This project costs 30 dollars and makes your water heater new again !
DO NOT TURN POWER ON BEFORE THE TANK IS FILLED

Open the faucets in the house when they quite blowing air the tank is full !

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1 Answer

Themostat is bad


If water heater thermostat is bad, buy a generic thermostat at hardware store and install it according to instructions shown on link below:
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
I usually replace both upper and lower thermostats for about $28.
Lowes sells thermostats and elements.
If your water heater is a single-element/ single-thermostat, you can buy any thermostat with red reset button.
Technically a single-element thermostat has 1 less screw, but either thermostat will work.
If your water heater is 120V or 240V, the same thermostat will work of either voltage.
This is true because the thermostat is a simple bi-metal heat-reading device that does not operate on electric current.

That being said, you might want to test parts before replacing anything, in case problem is element.
To do comprehensive electric water heater troubleshoot:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Image below shows generic thermostat with reset button. Each of these will work for single-element or dual-element tanks with either 120V or 240V. Wires connect just as they did on old thermostat. Tighten wires very tight. Press in reset button to make sure ECO is set. Put insulation and cover back over thermostat when finished.
geno_3245_194.jpg

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1 Answer

My boiler keeps running even with thermostat removed from circuit. It is a Raypak H1-133A thermionic heating system (pipes in the floor) about 15-20 years old. (thermostat is original, 50 years old).


I answered you previously with information that didn't help. I'm not answering for the $5, but to try to help you. It's been several days and I assume Raypak is not helping.
Possibly the thermostat closes a relay that is on the main control board, maybe this relay is stuck closed. Can you follow the wiring from the stat to the controller? Something in the controller is thinking you need heat.
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Gas hot water heater will not automatically heat water, i have to manually start the burner to heat the water


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1 turn off the gas 2 drain the heater 3 unscrew pilot, main burner, and thermocouple lines from bottom of thermostat. 4 unhook gas line from thermostat. 5 unscrew thermostat from heater tank. Use pipe sealer when you install new thermostat, and gas line fittings. burner and thermocouple lines seal on a taper seat and do not need sealer. after reassembly check for leaks with soapy water, not a match, light the pilot and turn up the temp. The heater may sweat quite a bit while it is heating up the first time, this is due to the cold water on the inside and the fire on the outside. some water may drip in the bottom of the heater and you might think you have a leak, but let it heat up completly, if the water is still dripping after the tank is hot then you need to find the leak.

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2 Answers

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I presume that this a fully pumped system - air lock doubtful There maybe on/off valves on the pipes to and from the back boiler [situate close to cylinder] make sure they are on - anticlockwise turn
or there could be a blockage in the outlet from header tank usually in the loft. or If there is no water in it maybe the mains cold feed it is off.
Note if no water in it DO NOT USE the back boiler

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1 Answer

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Hi,Richmart
I'm Harvey the Plumber,
First, Your question is if your thermostat is wired correctly!

Assuming that it is correct, a common problem that most people and plumbers overlook is correctly setting the heat anticipater on the thermostat.
Assuming that you have a gas central heating system, then you must simply look on the gas valve for the amp rating.
For instance,if the gas valve printing says .4 amps then set the heat anticipater for .4
It's common for the unit to turn on and off erratically (short cycling) when this setting is not correct.
If all you are worryied about is the wiring, you must look at the wireing diagram that came with the thermostat.
Further diagnoses would requie detailed information about your central heating system.
Or the alternative would be to have a hands on tech help you out.

Feel free contact me again!
Please give me a rating here at fixya.com before you sign off
Thank you,
Harvey

Sep 07, 2008 | Water Heaters

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