Hotpoint RGB747GER oven does not heat properly. The oven temperature when read by meat thermometer place in center of oven is 1/2 of control setting ( i.e oven temperature set for 300 degrees displays 300 degrees, but manual thermometer placed in oven reads 150 degrees). Never gets hot enough to cook rolls, cookies, cakes,meats properly Did adjust thermostat to max setting of +25 degrees - change not enough to help. Did have a F ? error about a year about, but unplugging/ pluggin back in cleared. Seems to ignite and quality of flame looks ok. Broiler & cleaning mode temperatures seem to work fine.

Hello, Vicki -

I hope you have a meat thermometer.

I suggest you roast the pork at 250 degrees Fahrenheit, so the cooking time will take longer. When you return home, pull the roast out of the oven and insert your meat thermometer. The internal temperature of the meat needs to be between 140-145 degrees F. If it is not, put the pork roast back in the oven and turn the heat up to 350 degrees F. Check the internal meat temperature every 15 min.

You CAN set the cooking temperature even lower to allow for an even longer cooking time. But NEVER set it lower than 200 degrees F.

Note: Be sure to turn your oven off when no longer needed. Plus, allow the meat to rest 10-15 min. before carving.

A lot depends on the oven itself, whether it is fan forced, how well it holds heat etc.

Preheat to 240°C/475°F/ gas 9, place the meat in, and turn down to 200°C/400°F/gas 6. Cook it for about 1 hour, then take it out and place it covered on the serving dish for 15 min. before carving. This first go may need to have slightly modified times for the next roast you cook.

To get a perfect result you really need a meat thermometer

http://i.stack.imgur.com/blUvw.jpg

You don't need to put this in the oven with the meat, just insert the tip to the middle of the roast when it gets near time to see what is happening

Medium rare (? point) warm red center; firmer 55-60 °C Medium (demi-anglais) pink and firm 60-65 °C

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It sounds to me like the oven thermostat is faulty, as this is what controls the temperature.
If you can , get a thermometer and place it in the oven and check the temp against the seting with the thermometer, if as you say it is 100 degrees above setting , then you need to replace the thermostat.

Oven will not hold correct temperature:------- This can be caused if temperature probe not working.Resistance across temperature probe leads at room temperature (70°F) should be approximately 1096 ohms.----------- Other possibility for this problem is :--- Temperature control not calling for heat.When heat is required, there should be continuity between terminals 6 and 7 on temperature control.-----------Inadequate or improper ventilation.Check ventilation hood. Verify draw and make up air adjustment.-----------If all this checked out ok then its calibration problem.For calibration follow this procedure:--
It can be problem with temperature controller. TEMPERATURE CONTROLLER (Standard-Control Models Only) The calibration of the temperature controller should not be changed until sufficient experience with cooking results has definitely proved that the temperature controller is not maintaining proper oven temperatures. Before any recalibration is attempted, the oven temperature should be checked by the following procedure: 1. Remove all trays and pans from the oven. 2. Place a thermocouple or a reliable mercury oven-type thermometer at the center of the middle rack. 3. Turn the oven ON and set the temperature control knob to 400°F. 4. The amber "heat on" light will go out when the oven temperature is reached. 5. Allow three cycles for the temperature to stabilize. 6. Read the thermocouple or thermometer immediately after the light goes out for the third time, and again immediately after it comes on the next time. 7. If the average of these readings varies by more than 10°F from the dial setting, recalibrate by the following procedure. Recalibration should be attempted only by a competent service technician. Use the following procedure to recalibrate the oven: 1. Loosen the two set screws that secure the temperature-control knob to the temperature-control shaft. 2. Remove the knob from the shaft, being careful not to rotate the knob or shaft. 3. Replace the knob on the shaft so that the indicator mark on the knob points directly at the temperature that was measured at the center of the oven. 4. Re-check the oven calibration. ----------- Part number for temperature probe is 1181996 and you can order if from the Southbend service center. -------- If you want the manual and wiring diagram for your oven.Please click the link directly:-- http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man ----------- after you click the link,a page will open in that you fill the 5 letter number.And click the "download now " option.It will ask you to save or discard.Click the save option and download will start.It will take 2 mins to download.Then click the download file to open it.And go through the manual.------------This will help.Thanks.Helpmech.

You can have the oven recalibrated by a professional OR you can purchase an oven thermometer and check the temperature yourself. Place the oven thermometer in the oven.Set the oven to a specific temperature. When it indicates it is at that temperature check the thermometer. Adjust your setting by that many degrees. For instance, if you set the temp at 350 and the oven thermometer shows 450, then reduce your temperature setting by 100 degrees each time you use the oven.

Unfortunately, the old owner's manual doesn't say, but you can do a test to see what its heating power is:

MICROWAVE HEATING POWER TEST

The following test will provide a suitably accurate measurement of the output power of any microwave oven. Variations or errors in performing this test will produce uncertain results. If the line voltage (from the electrical outlet) is low, the magnetron output will be correspondingly low.

Equipment needed:

- Microwave safe container with 1000 mL (1 Liter) gradation.

- Fahrenheit or centigrade thermometer

Procedure:

Pour exactly 1000 mL (1 Liter) of cool tap water into the container. Using the thermometer, stir the water, then measure and record the temperature. For accurate results the water should be about 60 degrees F (20 degrees C).

Place the container on the center of the oven cooking shelf (do not leave the thermometer in the container and remove any metal racks), and heat the water (at full power) for 63 seconds. Use the second hand of a watch, not the oven timer.

After the heating time is completed, immediately remove the container, stir the water, re-measure and record the temperature of the heated water.

Subtract the starting water temperature (step 2) from the ending water temperature (step 3) to obtain the temperature rise.

To determine the output power in watts, multiply the total temperature rise by a factor of 38.75 if you're using a Fahrenheit thermometer or by 70 if you're using a centigrade thermometer.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oddly, the owner's manual doesn't say.

You can contact GE customer service here, or if it's working properly, here's a test that will tell you how much output power it has:

MICROWAVE HEATING POWER TEST

The following test will provide a suitably accurate measurement of the output power of any microwave oven. Variations or errors in performing this test will produce uncertain results. If the line voltage (from the electrical outlet) is low, the magnetron output will be correspondingly low.

Equipment needed:

- Microwave safe container with 1000 mL (1 Liter) gradation.

- Fahrenheit or centigrade thermometer

Procedure:

Pour exactly 1000 mL (1 Liter) of cool tap water into the container. Using the thermometer, stir the water, then measure and record the temperature. For accurate results the water should be about 60 degrees F (20 degrees C).

Place the container on the center of the oven cooking shelf (do not leave the thermometer in the container and remove any metal racks), and heat the water (at full power) for 63 seconds. Use the second hand of a watch, not the oven timer.

After the heating time is completed, immediately remove the container, stir the water, re-measure and record the temperature of the heated water.

Subtract the starting water temperature (step 2) from the ending water temperature (step 3) to obtain the temperature rise.

To determine the output power in watts, multiply the total temperature rise by a factor of 38.75 if you're using a Fahrenheit thermometer or by 70 if you're using a centigrade thermometer.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

The owner's manual (which you can download here) does not say, but most of their ovens from that era were 700 watts.

There is a way to check:

MICROWAVE HEATING POWER TEST

The following test will provide a suitably accurate measurement of the output power of any microwave oven. Variations or errors in performing this test will produce uncertain results. If the line voltage (from the electrical outlet) is low, the magnetron output will be correspondingly low.

Equipment needed:

- Microwave safe container with 1000 mL (1 Liter) gradation.

- Fahrenheit or centigrade thermometer

Procedure:

Pour exactly 1000 mL (1 Liter) of cool tap water into the container. Using the thermometer, stir the water, then measure and record the temperature. For accurate results the water should be about 60 degrees F (20 degrees C).

Place the container on the center of the oven cooking shelf (do not leave the thermometer in the container and remove any metal racks), and heat the water (at full power) for 63 seconds. Use the second hand of a watch, not the oven timer.

After the heating time is completed, immediately remove the container, stir the water, re-measure and record the temperature of the heated water.

Subtract the starting water temperature (step 2) from the ending water temperature (step 3) to obtain the temperature rise.

To determine the output power in watts, multiply the total temperature rise by a factor of 38.75 if you're using a Fahrenheit thermometer or by 70 if you're using a centigrade thermometer.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

1) MICROWAVE HEATING POWER TEST

The following test will provide a suitably accurate measurement of the output power of any microwave oven. Variations or errors in performing this test will produce uncertain results. If the line voltage (from the electrical outlet) is low, the magnetron output will be correspondingly low.

Equipment needed:

- Microwave safe container with 1000 mL (1 Liter) gradation.

- Fahrenheit or centigrade thermometer

Procedure:

Pour exactly 1000 mL (1 Liter) of cool tap water into the container. Using the thermometer, stir the water, then measure and record the temperature. For accurate results the water should be about 60 degrees F (20 degrees C).

Place the container on the center of the oven cooking shelf (do not leave the thermometer in the container and remove any metal racks), and heat the water (at full power) for 63 seconds. Use the second hand of a watch, not the oven timer.

After the heating time is completed, immediately remove the container, stir the water, re-measure and record the temperature of the heated water.

Subtract the starting water temperature (step 2) from the ending water temperature (step 3) to obtain the temperature rise.

To determine the output power in watts, multiply the total temperature rise by a factor of 38.75 if you're using a Fahrenheit thermometer or by 70 if you're using a centigrade thermometer.

2) If it's not hidden either behind the grille or control panel, they may have left it out as a cost-savings measure.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

This is a simple fix as long as the oven is heating properly and the only problem is that the temp seems higher than what the temperature control knob indicates...

Purchase an inexpensive oven thermometer from the hardware store and place it in the center of the oven. Set the temperature control knob to 350 degrees F.

Check the temperature indicated on the thermometer in the oven after 20 minutes. If it's not within 5 degrees of 350, you'll need to adjust the oven's temperature control.

Turn the oven off.

Pull off the temperature control knob. You can usually pull it off by hand, pry it off with a thin screwdriver, or slide a piece of cord up behind it and pull.

Note which kind of temperature control knob you have. There are two types: The first has a screw in the shaft of the knob; the second has an adjustment dial on the back of the knob.

Adjust the temperature with the first type by turning the screw in the shaft with a screwdriver. Turn it clockwise to lower the temperature; turn it counterclockwise to raise the temperature. Turn the screw just a little bit in the appropriate direction.

Adjust the temperature with the second type of knob by turning the dial on the back of the knob. (This dial is held in place with a screw or a clip that will need to be removed.) Raise the temperature setting by turning the dial counterclockwise; lower it by turning the dial clockwise. The notches are typically in 5 or 10-degree increments.

Test the oven temperature again.

Repeat until you're in the right temperature range.

Good Luck!