Questions tagged [relay]
A relay is a control device that allows a small voltage or current to control a larger voltage or current. Use this tag for questions about standalone relays in electrical or HVAC wiring -- questions about relays in appliances do not need this tag.
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Table saw not starting and tripping 15a breaker
EDIT: Previously I reported that my saw was tripping the breaker for a different circuit, but I was mistaken. I'm updating the question with the correct information.
I have a pretty old Craftsman 10&...
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Low voltage relay to control well pump -- would like run unswitched power to subpanel in shed by well
Well is about 130 feet down hill through woods from basement with 200A panel, pressure tank, and 120v pump switch.
When they put in the well 17 years ago, I asked that they put in a cord so we could ...
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AC Unit Delay Start - Is it contactor?
I have my upstairs AC unit acting up recently. Previously the AC unit used to start instantaneously as soon as thermostat sends the cool signal or if we manually change it from off to cool. But lately,...
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Sprinkler Pump Outdoor Plug with Relay
We recently bought a home that had a shed, which we removed. The shed housed a run of cable to a sprinkler pump at the back of the property. It also housed the pump start relay. The shed is now gone ...
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Using "dumb" fan control switch as a remote
I have a standard 3-speed fan and dimmable light bulb that I would like to control independently using this specific "dumb" switch, with two independent dimmers for the fan speed and light ...
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How do I fix a noisy humidistat/relay?
I have a Rudd furnace with a Honeywell home humidistat. It seems like when the humidity in the house get to the same setting that the humidistat is set to, that the relay opens and closes about a ...
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Can RPM Sensor cause short circuit? Craftsman 1/2 HP Garage Door Opener Model 139 Relay (Power Board) trips as soon I connect the RPM sensor
I'm facing an issue with my Craftsman 1/2 HP Garage Door Opener Model 139. I found it dead one morning, no power, no led light was lit in the head unit, and wall controller light was flickering.
On ...
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Fridge died for New Years eve. Should I replace the overload protector or the whole relay? (full details, testing inside)
Fridge: Sears 970-681020
Combination relay: 213615005 (embraco/eecon tsd-115/127v-60hz-y)
Compressor: egz 70hlp embraco
Symptoms: Click, BRRRRR (4 seconds), Click....... no cooling
Tests: Pulled the ...
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Controlling 15amp outlet for compressor with Honeywell RC840T-120 and 18g wire to toggle
I have a compressor in my crawlspace that I'd like to turn on by using a low volt toggle.
I was planning to use Honeywell RC840T-120 such that my 18g wire is hooked up to the 24v leads and causes the ...
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Do I need a junction box for thermostat wire splices?
I have an oil fired heating system with 4 zones heated with baseboards. I recently noticed that one of the zones stopped working because its thermostat wire in the basement was frayed. I removed that ...
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Thermostat Wiring for Zoned Hydronic Heating
I have a 7 zone circulator pump heated using Navien combi-boiler. 3 thermostats are connected to the boiler, and the remaining 4 are connected to a Taco SR-504 relay. All the connections have 2 wires, ...
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Single pole relay on a 240VAC split phase circuit?
I'm installing an EV charger but my panel is only big enough to run either the dryer or the EV charger at the same time. So I have a current sensor on the dryer line so that when the dryer is running ...
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How can I simultaneously disable an inverter (that draws big currents) when switching off another circuit?
I have the setup below in my cabin. Currently I have to manually turn off the inverter for the 220V as well as the main switch when leaving the cabin. I would like the main switch to control both, by ...
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How can I test a potential relay on my AC
My starter capacitor failed so I installed another one and it failed also.I was told if the relay failed it could blow the capacitor.
I tested the relay and it is normally closed, how can I test it to ...
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Is the start relay for my Whirlpool broken? It rattles
My fridge has stopped cooling and with some cursory research I've determined that the problem may be the start relay. I've seen this diagnosed by shaking it to listen to any rattling sound. Does this ...
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