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Need thermostat for 240 volt patton electric heater

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Try Grainger.com for this

Posted on Nov 15, 2008

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Wiring diagram RUUD UAPA-036JAZ


the condensor gets 240 volts a-c and 24 volts a-c to control contactor. pretty straight forward on this 3 ton unit. the 240 volts comes off breaker box and the 24 volts comes off thermostat and common of transformer.

Jun 10, 2014 | Ruud Air Conditioners

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Why won't the compressor run


This can be for a variety of reasons. It ranges from something as simple as no supply power (blown fuse, open breaker, faulty contactor, or run capacitor) or it could be more serious as a grounded or open winding in the compressor motor. My suggestion to any novice and or person without proper tools and knowledge; First check the low voltage (24 volt control voltage) by turning on the "Fan on" switch located on the thermostat to on, not "Auto" The blower fan should come on, indicating there's 120 volt and 24 volt available. Fan doesn't come on is an indication that there's no control power. The next step would be to check for power at the transformer and fuse located in the air handler. There should be 240 volts feeding the transformer, and 24 volts coming out. The control voltage is needed to operate the thermostat (which is the switch that sends the 24 volt signal to the compressor contactor to turn the compressor on/off. This 24 volt also powers other relays and switches in the system. knowing that 24 volt is available also tells you that the problem is most likely in the condensing unit (outside, where the compressor is located). At the condensing unit you should check for 240 volt supply power. Upon finding 240 volt supply power the question now becomes whether or not the thermostat is calling for anything (cool or heat if the unit is a heat pump). There should be 24-30 volt available at the small gauge wires feeding the contactor coil. While having the thermostat set at a temperature lower than the current room temperature (in the cooling mode) the thermostat should send a 24 volt signal to close the compressor contactor and turn it on. The non-metallic end of a screwdriver can be used to depress the moveable part of the contactor. After pushing in the contactor, should the compressor start then you may only need a new contactor. It may just hum because of a faulty run capacitor or grounded or shorted internal motor windings (grounded or shorted windings are usually indicated by tripped circuit breaker and/or blown fuse). It's a good idea to have a good multi-meter and knowledge of use before attempting any repairs or diagnosis on your own. I recommend some basic knowledge of electricity before even thinking about attempting any repairs or diagnosis.

May 08, 2014 | Goodman Manufacturing Goodman GSC130421...

1 Answer

Evcon eb15b


thermostat, heat sequencer or contactor, no 240 volt power no 34 volt power

Nov 23, 2013 | Coleman Air Conditioners

1 Answer

I have four 8' 240 volt baseboard heaters and want to wire them in pairs tied into the control panel with wires that are about 20' long. What gauge wires, 14 or 12? Three wires (with a ground, I...


Actually David, you will need at least 6 or 8 gauge wire, since it's a 240 Volt System. Any larger gauge and the wiring will melt & short out.

Hope this helped you and thanks for choosing FixYa.

Sep 19, 2011 | Air Conditioners

1 Answer

I want to buy form Costco a Sylvania Convector 2000 watts with built-in thermostat. I already have a wall electronic programmable thermostat.can I install this convector anyway and not plug the built-in...


No, you will only be able to use the heater's Thermostat.The programmable wall thermostat you already have is either an 18 volt or 24 volt thermostat. It won't work with a portable electric heater.

Hope this helped you and thanks for choosing FixYa.

Aug 26, 2011 | Air Conditioners

1 Answer

How do you tell with a voltmeter if the contactor coil is bad?


Check for 24 volts AC at the coil. If you do not have 24 volts at the coil (with AC turned on at your thermostat), then your problem is not with your contactor, but rather a control problem. If you have 24 volts at the coil, check for 240 volts on the LINE side (commonly marked L1 & L2) of your contactor. If you do not have 240 volts, check for open fuse or tripped or bad circuit breaker. If you have 240 volts, check for 240 volts at the LOAD side of your contactor (Commonly marked T1 & T2). With 24 volts on your coil and 240 volts on the LINE side, you should have 240 volts on the LOAD side. If not, the contactor is not making contact.

You can also perform a continuity test as shown in this video:

May 23, 2010 | Ruud UAKA030 Air Conditioner

2 Answers

I am replacing 2 100" long Electromode baseboard heaters. The service from the thermostat is on the lefthand end facing the unit.They are 240 volts and I do not know what the wattage is. 1.Can I use...


wattage is amperage x current


just use the formula to determine the wattage

the amperage should be listed on the name plate.

formula goes:

wattage= amperage x 240

hope to be of some help

Apr 23, 2008 | Air Conditioners

1 Answer

Vulcan cx90 ducted heater


240 volt wiring required.

Mar 06, 2008 | Air Conditioners

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