Question about Intermatic T103 Indoor 120-Volt 40-amp Timer Switch-Double Pole/Single Thro

1 Answer

Hot water intermitten and also burning smell coming from Intermatic T103 Timer

A few days ago, we had an issue where we had no hot water. I'm no electrician by any means and it will be even more obvious after reading this post. I checked online which suggested resetting the top t-stat. Did that and the next day all seemed well. This was on the 29th, and we hadn't had any issues prior to this in the few years we've been in the condo. The hot water heater is a 5-6 year old 40-gallon Rudd electric that was replaced in our 'built-in-70-something condo'. For the most part, it always seemed okay-- there have been occassions where we would have scalding hot water, or times where it would be only semi-hot. After I reset the top tstat, I purchased a repair kit(2 thermostats, heating element seals, and two heating elements) just to see if that helped. I haven't gotten around to swapping out the elements or tstats yet. It also occurred to me that we had a timer just above our hot water tank access panel in our coat closet. I honestly never knew what the little box was until we had this initial problem. Never had a problem with the timer either. Last night, we ran the dishwasher and also a load of laundry in the washing machine. Just around this time, my fiance went into our coat closet for something and smelled burning. The closet is under our stairs with an access panel to the hot water heater. Our timer is an Intermatic T103 timer. My nose pointed me to the little timer box, and boy did it smell BAD, like electrical. This time looks pretty old (although some of them do lack modern styling) but as stated before, we haven't had any issues with it in the past. I realize that it's pretty cold out my way and there might be some delay for us to get hot water through cold pipes, but this is different. We haven't ever had issues with the water being ice cold for extended periods of time (i.e. feels like the heater is not working). I don't even know what the real issue is or if there are multiple issues here. Last night I kept an eye on the timer and turned the timer from the manual on position to off. I was thinking that would bypass the timing setting and just pass the current directly to the hot water heater. Smell did die down last night and I decided that I would check in the morning. This morning I checked the timer and the timer was in the on position. I immediately turned the breakers off to the hot water tank, to avoid any catastrophe while I'm not home. Anyone have any insight or past experience that will be helpful?

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  • Intermatic Master
  • 5,089 Answers

Jan 2013. Yes very experienced. Multiple issues. Bad thermostat. Burned contacts on timer.
Let's break it down.

1) Water heater tripped:
29th the electric water heater reset button was tripped because ECO detected high heat from very-hot-water, or nearby burned wire, or loose wire, or bad thermostat.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

2) Description of water heater:
40 gallon Rudd (Rheem), 2 thermostats and 2 elements indicates ordinary 240Volt water heater.
More information shows on label on side of tank, including valtage rating (208-240), and element wattage (usually 4500 watts).
Rheem-Ruud serial number, 3rd and 4th digit are year of manufacture.

3) Solution for water heater:
Tripping ECO reset button, Very hot water, and sometimes not-so-very-hot ... sounds like bad thermostat, and/or bad element. Replace both thermostats, and see if problem persists. Then replace elements if needed.

4) Information about timer:
Water heater circuit has 40 amp T103-Timer, which is plenty heavy for ordinary 240Volt household water heater that draws 19-22 amps.
T103 timer has repair parts, and can usually be repaired unless overheated contacts caused melting, but that can also be worked around in some circumstances, or the internal mechanism replaced by buying T103M mechanism-only and snapping into existing box.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timers.html

5) Solution for timer:
Attach photo of inside of T103 timer, and I can assess what steps will most likely fix the timer.
Maybe the timer is not connected to water heater.

Posted on Jan 02, 2013

  • 2 more comments 
  • Mike R
    Mike R Jan 03, 2013

    Gene, thanks so much for the reply. Looks like you spent tons of time writing that all out. Certainly appreciated. So here are a few pictures. Not the wiring ony the left. You can see burn marks - when I tried to unscrew it, some of the surrounding plastic snapped. The sheilding from the wire is also burnt. On another black wire, you may be able to see it - where the sheiding is cut for the copper wire to make contact - just below that looks to be some shiny black stuff. I'd compare it to the look of fresh tar (shiny). I don't know if this was a result of whatever was going on, but I figured it would help to point that out.



  • Mike R
    Mike R Jan 03, 2013

    The second pic is after I took the timer out of the case. I felt that this thing was pretty much toast. My fiance is interested in me calling an electrician since there was burning on the shielding. I didn't think it was safe for me to do this. If the wires were burnt, I felt better about someone looking at it to verify it needs to be replaced.

  • Gene Haynes Jan 03, 2013

    That's a very old timer. I've seen one still working from 1940s. You might have 1960s version. I can't see wiring clear enough with the degraded image on fixya.. However new T103 timer will snap into old box, since Intermatic still uses same enclosures today as 1940s, except more room for wiring at bottom. If the clock motor # is WG1570 then that is 120Volt. If the timer is 120Volt, then order another T103 or T103M, and replace wires one-for-one. Amazon shows T103 for 65$, and it comes with new box. No need for electrician if you can take mechanism out of the enclosure and take photos.. Just snap new T103 mechanism into old box, and twist screws very tight against copper wires. Again, wires will be 1 for 1 change-over. How to operate timer:http://waterheatertimer.org/pdf/How-to-o...

  • Gene Haynes Jan 03, 2013

    My local Lowes carries T103 in stock. In electric department. To keep water heater working if timer is burned up, then move wire on 2 and join with wire on 1. And move wire on 4 and join wire on 3. It will work. Just label your wires and keep box door closed for safety, just like you keep cover plate over wall outlet. All electrical connections have a box cover.http://waterheatertimer.org/Troubleshoot...

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SOURCE: Intermatic electric water heater timer only gives

Try turning your thermostat up 20 degrees. That will make hotter water, requiring more cold to mix so you'll use less hot water for the shower. If that helps but you'd like it longer, increase the temperature in 10 degree increments until you reach a temperature that works.

Posted on May 14, 2009

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SOURCE: timer comes on at different hours of the day and night

make sure its set to auto not random. also, make sure you dont have additional times in your setting.

Posted on Jul 14, 2009

gotgeek2
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SOURCE: Circuit breaker keeps tripping when timer turns

Since the timer doesn't trip the breaker until it turns on the load, the circuit is OK up to and including the timer. Either the load is faulty (has a short) or the wire supplying the load is damaged. You can test the wire that supplies the load by disconnecting the load then turning the manual switch to ON. If the breaker doesn't trip, then you know it is the load itself that is causing the problem.

Posted on Mar 21, 2010

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SOURCE: Set up Intermatic outdoor timer 7day/7event

I have misplaced and forgot how to set a Model HB65R timer, can you help, thanks, Murray

Posted on Dec 24, 2010

SOURCE: Model T101 is not turning

The breaker is tripping?
Timer starts again when you flip breaker. It sounds like breaker is loose on the busbar, or there is loose wire that stops making contact, and then the timer turns off because no electricity is flowing to timer.

You have T101 timer.
When the timer is off next time: Stand on dry surface or dry boards. Open cover. Notice there is a plastic insulator that covers wiring terminals. On the insulator, each wiring terminal is marked: A 1 2. Remove plastic insulator that covers wiring terminals. Use ordinary electrical tester. Tape tester leads to wood sticks to keep hands away from voltage. Test across terminals 1 and A for 120Volts (or 110, 115, 125V is all the same).
If there is no voltage, then circuit breaker and/or wire from circuit breaker is suspect.

Resources:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T101
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100

http://waterheatertimer.org/How-to-replace-circuit-breaker.html

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Posted on Sep 13, 2011

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1 Answer

Need t173 part for intermatic hot water heater timer


Open following link for T100 series parts:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100
The T173 timer is 120Volts and wires same as T103.
Only difference between T173 and T103, is the T173 has day-skipper wheel
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

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T103 timer is operated with 120Volt AC power.
Open following link to identify correct wiring and identify timer.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Oct 06, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

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T104 double how do i install it on a 220 v hot water heater


Intermatic T104 is 240V timer with 240V clock motor.
Wiring diagrams are shown on links below:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

http://waterheatertimer.org/images/T-104-240-Volt-400.jpg

http://waterheatertimer.org/B220C.html
Terminal A is not used unless cable from breaker box has extra neutral wire. Extra neutral wire would connect to terminal A.
T104 has the extra terminal A since same mechanism is used for T103 120V timer that utilizes terminal A.

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For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
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Feb 01, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

We install the timer and it does not work automatically. We can switch it on only manually


You posted under T103 Intermatic 120V timer.

Sounds like you wired the timer wrong:
Timer has 120V clock motor and requires Hot from breaker on terminal 1, and Neutral from breaker on terminal A. This will power clock motor.
If you have any of the wires reversed, timer will do what you describe.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 26, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

Intermatic electric water heater timer only gives enough hot water for a 7 minute shower. How do I increase this time?


Try turning your thermostat up 20 degrees. That will make hotter water, requiring more cold to mix so you'll use less hot water for the shower. If that helps but you'd like it longer, increase the temperature in 10 degree increments until you reach a temperature that works.

May 14, 2009 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

Intermatic T103 - It was working. However, now I


Intermatic has had an issue with the main drive gear striping in there timers, I don't know of any best practice repair method for this part, I suggest you replace it or if your not electrically comfortable call a local electrician.

Hope this helps...
Tim

Mar 22, 2009 | Intermatic T103 Indoor 120-Volt 40-amp...

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