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RK746GP1 Hotpoint dual oven

5 posts in this topic

I have a few questions about a Hotpoint dual wall oven model RK746GP1. My mother who lives several states away has this appliance.  The top oven is not working at all and the bottom oven is off calibration by 50' F according to the repairman she called.  Apperantly he calibrated the bottom from 85'F off to 50' F. 

 

What componets will cause calibration to be off? 

 

My thought on both issues is to replace the temp sensor and the controller.  Does this sound correct with the limited info I have provided? 

Thanks

 

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Oven sensor is the most obvious and common culprit:  http://www.repairclinic.com/PartDetail/Oven-Sensor/WB21X5301/252618

 

You can test it my measuring its resistance from its harness connector on the ERC.  Should get about 1080 at room temp (defined as 71F).  There are various temperature resistance data tables out there that list the resistances at various temperatures.  All oven sensors work the same way.

 

Also have to question how the guy did the calibration.  It actually takes a significant amount of time and an expensive instrument to do a proper calibration.  I use a Fluke T2 dual channel thermocouple instrument-- Dacor recommends that their servicers use this specific instrument.  But most guys don't want to plunk down $300 for one of these.  You then have to set oven temp at 350F and wait and record three iterations of  control cycling temperatures off and around the set point.  Can take almost an hour.  I charge a minimum of $175 for oven temperature calibrations, more for double ovens.  

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I appreciate the information.  I too question the calibration.  The information I got was third hand possibly even fourth.   

 

How 'bout the one that's playing dead?  One controller for both ovens.  I see at "Repair Clinic" that they have stopped manufacturing the particular controller.  Do you all repair or remanufacture controllers? 

 

Thanks I realize how difficult it is to troubleshoot 1000 miles away especially when the information source is also a 1000 miles away from the appliance with sketchy info at best.  Thanks for your help. 

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How 'bout the one that's playing dead?  One controller for both ovens.  I see at "Repair Clinic" that they have stopped manufacturing the particular controller.  Do you all repair or remanufacture controllers? 

 

 

No bake or broil in the top oven?  Makes me suspect an open hi-limit in the circuit.  Check the schematic to see if there's a hi-limit bimetal in the heating circuit for the dead oven.  If so, then check it to see if it's open.  

 

If no hi-limit in the circuit, then you'll need to check the output from the ERC to the bake and broil elements.  Seems less likely to me because you'd be talking about two bad relays on the board instead of just one.  Still could happen but would be unusual.  

 

We don't rebuild board but check with Fixyourboard.com

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Lower oven has a mechanical t-stat and being a Hotpoint/GE most likely no adjust screw in center of t-stat to adjust, most likely just an adjustment of +35 to -35 degrees by changing the adjustment on the back of the oven t-stat knob, (was 85' off, changed by as much as possible 35' = still 50' off).

 

Could have a double line break relay bad on the oven controller for the top oven which would be just one part to fail and cause both bake and broil to not work or as Samurai said, check the tech/wiring diagram for hi-limit t-stats that might be common to both bake and broil for the upper oven.  Looking at the parts for this unit on RepairClinic it looks like there are 3 different limit t-stats, one would be up in the console area and the other two most likely on the back of the oven, (one for each oven).   None of them have a reset button and I don't know if any are a thermal cutoff that won't reset when cooled down.  Even if they are the type that reset themselves they could be bad.

Edited by Budget Appliance Repair

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