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Tr3100 thermostat problems

I have wired up the tr3100 thermostat for underfloor heating and I only get a blue background light. There is also a red led light that is not showing as lit

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: replacing thermostat

YES THE BLUE WIRE DOES CONNECT TO THE C TERMANAL FOR COMMON

Posted on Sep 12, 2008

  • 15 Answers

SOURCE: Replace three wire thermostat with four wire thermostat

From the two red and two black wires (and the specs in the pdf), your new thermostat sounds like it's designed to directly control the line voltage (120 or 240) to the heater. That's the usual way baseboard heaters are controlled.

Could your wires be red, black, and (old, yellowed) white, the standard colors in a 3-wire power cable? Just the red and black should be enough to control a 120-volt heater so I don't understand what the white would have been used for. If it were my heater I'd take off the cover(s) -- with the power off, of course -- and find out what those wires actually connect to.

Posted on Jan 26, 2009

  • 1 Answer

SOURCE: honeywell thermostat

I had the same problem and decided to take a chance and call honeywell customer support. I am shocked, they solved my problem! At least in my situation we found that the blue wire ran the compressor. Instead of hooking up to "blue" on the thermostat, we hooked it up to "white." It works wonderfully now.

Posted on Apr 25, 2009

  • 587 Answers

SOURCE: Need wiring diagram for Honeywell RCT8100

The old thermostat has a second stage heat which is W2. The new one doesn't have second stage heat.
The wiring your describing on the old thermostat is telling me you have a heat pump with second stage heat and the new thermostat is for air conditioning only. You will need to get a thermostat for a heat pump.

Posted on Apr 02, 2010

liteswink
  • 99 Answers

SOURCE: Replacing WHITE-RODGERS manual thermostat with 3

Give me the old connection then I will cross terminal this with Honeywell thermostat. This will be fairly simple.

Posted on Apr 06, 2010

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2 Answers

My radiant floor heating suddenly stopped working. Wall thermostat is functioning normally. GFCI test is working fine. What can I check next?


Monica, There might be a break in the wire mat, you or a electrician will have to check with a digi multi meter.
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Wires don't match the new thermostat posts. The wires from the furnace are Red,Blue black and white The posts in new thermostat are B O G Y not used R and Rc Can't figure which to put


The wire colors are for the following functions ......red - 24 volts white - heat yellow - AC green/blue - blower (fan) red is connected to the R with a jumper between R and Rc What type of furnace/heat do you have ???? Electric. oil, gas .Forced hot air, baseboard, steam, heat pump, or ?????? Different systems use different connections and need a specific thermostat for that application !!!

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Look for a stuck relay that controls the pump

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I turn on the power switch and the blower turns on and stays on. I can get the pilot light to stay on but the burners will not light even after I turn the RED gas valve to ON. There is no thermostat...


Hello Skyhalliday,

I understand that you are having a problem with you central heat/air. You do not have a thermostat installed and have the red and yellow crossed in order to make the unit run.

The wires you have crossed are not to the heat if they are to the common color code. Here is the color code for HVAC units:
Thermostat / Wire / what is controlled
W / White / Heat gas valve or heat elements
Rc(Rh) / Red / 24 volts transformer
G / Green / Fan
Y / Yellow / Air Conditioner Outside unit
C / Blue or Black / Common (energizes thermostats that do not have batteries)

You may not have the proper wires shorted in order to have the burners engage.

Thank you for choosing FixYa.com

Justin

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Red wire to R on thermostat red on furnace and red on heat pump Same with white except w1 on thermostat. Blue to common on thermostat common of furnace (probably brown but will be marked) and blue to common on heat pump. yellow to Y on thermostat and straight to heat pump. Orange to O on thermostat and straight to heat pump. If wired correctly with no shorts fuse problem should be solved. commonly people leave enough wire exposed inside the t-stat for wires to short together. This will blow the fuse. Hope this helps. I understand the frustration.

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1 Answer

Honeywell RTH230B cooling problems...


I printed out the instructions for your thermostat. It looks like you should have the following.

There should be jumper wire between Rh & Rc

Red wire to Rh or Rc whichever is easier since there is a jumper. This is the hot wire and all the thermostat does is connect to route it to the components needed for heating or cooling.

Blue wire, tape it up and don't use it. There is no spot on this thermostat for it. It is only used on thermostats that are powered by the transformer.

White wire to W. Powers the heat relay

Yellow wire to Y. Powers the cooling contactor

Green wire to G. Powers the indoor fan relay

There is a black jumper on the back of the face plate. Look at section 2.4 Setting J2 Jumper in the installation instructions. Make sure you have it in the right position for what you have. If you don't have them just google them.

Hope this helps.

May 24, 2010 | Honeywell Electronic Programmable...

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I have just installed underfloor heating with 4 zones. I also have the existing radiator system. The radiator system is currently programmed to come on and off twice a day but has no room thermostat. We...


You say you have3 rooms on the underfloor system that will probably require different temps. You said you have 1 zone valve for the under floor system. You can not control all the rooms with different thermostats and only 1 zone valve. You need more information and professional help here. I can give you more advice too...

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European color codes are black or brown for hot, blue for neutral, and green-yellow for earth or ground.

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Yes, the blue or yellow are interchangeable. they are for the cooling mode. Just first make sure the white is heat, green is fan and red is the power 24v.

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