LER7646 won't heat. I checked the resistance of the heating element (12ohms). The high limit thermostat reads 0 ohms and the thermal cutout read open on the ohm-meter. I replaced the thermal cutout and the element heated for a few minutes then shutdown. I rechecked the thermal cutout and it now reads open again. Do you have an idea what else to check before replacing this part again?

in addation to checking the high limit t-stat have you checked the thermal cut off (the small t-stat) on the heater housing where the element fits into, the high limit t-stat and the thermal cut off BOTH shoud have 0 ohms (the thermal fuse is in the blower housing) the cut off is on the heater box, if you have checked those to be good, check that the heat relay on the control board is closing and sending power to the element, if not replace the control, if all above are good then the motor switch is bad and not sending power to the element(thats a built in safety feature so the dry would never heat when the motor isnt running)the element of course heats only when 240 volts ac is to the element ,120vac from the relay on control through the high limit t-stat then through the thermal cut off finally to the element and 120vac from the motor switch for a comined 240 vac

The problem is most likely the thermal cut-off and the high-limit thermostat. The thermal cut-off blows when the high-limit thermostat fails and since these parts are wired in series with the heating element, power to the heating element is therefore terminated. Check the continuity of the thermal cut-off and if it reads open, replace it along with the high-limit thermostat.

You can bypass the thermal cut-off and the high-limit thermostat for troubleshooting purposes. Join together the wires of each part and insulate it properly then reconnect power. The two components indeed need to be replaced if the dryer heats up. If not and still no power to the heating element, check the continuity of the heating circuit. Check the continuity/resistance of the heating element if there's power to its terminals but doesn't heat. Replace the heating element if it reads open.

Let us know if you need further advice. Just indicate the exact model number of the dryer for accurate troubleshooting tips.

You probably have a bad thermal cut-off . This is the small thermostat , located at the top of the element housing . This " thermostat " should read infinate resistance ( no resistance ) . You can put the 2 wires togather , and see if heat comes on . pt # 3399848 . Both thermostats , should read 0 resistance . They are normally closed . The thermal cut-off , will not reset itself , if open . This is a safety t-stat , for when dryer gets too hot , and will have to be replaced .

Most likely a bad heating element and or bad thrmostats. you'll need to check these by ohming out after removing the rear panel to your dryer.

NOTE: The heating circuit should be troubleshot with the dryer UNPLUGGED. Dangerous voltages are still present with the dryer turned off. Resistance readings are as follows:

Heating Element (located inside heater box) – remove the two leads from the ceramic terminals on the heating element and take a reading across the terminal points. It should read 9 - 13 ohms.

Thermal Cut-Out (TCO) (mounted to the heater box.) - unplug wires and take reading across connector tabs. Reading should be 0 ohms.

Hi-Limit Thermostat (mounted to the heater box, closest to the heating element leads) - unplug wires and take reading across connector tabs. Reading should be 0 ohms.

If any of the above readings are abnormal, replace the component. NOTE: If the TCO or Hi-Limit Thermostat is defective it is highly recommended by most manufacturers to replace BOTH components at the same time. They are often sold as a set. Without doing so, these components can cause potentially fail again.

Your temperature thermostat or heater coil is most likely bad, you can test by ohming each. NOTE: The heating circuit should be troubleshot with the dryer UNPLUGGED. Dangerous voltages are still present with the dryer turned off. Resistance readings are as follows:

Heating Element (located inside heater box) – remove the two leads from the ceramic terminals on the heating element and take a reading across the terminal points. It should read 9 - 13 ohms.

Thermal Cut-Out (TCO) (mounted to the heater box.) - unplug wires and take reading across connector tabs. Reading should be 0 ohms.

Hi-Limit Thermostat (mounted to the heater box, closest to the heating element leads) - unplug wires and take reading across connector tabs. Reading should be 0 ohms.

If any of the above readings are abnormal, replace the component. NOTE: If the TCO or Hi-Limit Thermostat is defective it is highly recommended by most manufacturers to replace BOTH components at the same time. They are often sold as a set. Without doing so, these components can cause potentially fail again.

All the heating and temperature control components are located in the back of the dryer. To access, unplug the dryer and remove the exhaust vent hose. Turn the the dryer around so you can view the back and remove the back panel. With the panel removed, the component locations are as follows:

Right-Hand Side:

1. Heating element - located inside the heater box. If bad, the dryer will run, but will not heat. A good reading is about 9 to 13 ohms.

2. Thermal Cut-Out (TCO) - located on the outside of the heater box on the end opposite the heating element terminals. If bad, the dryer will run, but will not heat. A good reading is a short (0 ohms).

3. Hi-Limit Thermostat - located on the outside of the heater box adjacent to the heating element terminals. It works in conjunction with the TCO to help regulate the drum internal temperature. A good reading is a short (0 ohms).

NOTE: If either the TCO or Hi-Limit Thermostat are found to be defective, it is recommended that you replace BOTH components to prevent premature failure. These two components are commonly sold as a set.

Left-Hand Side:

1. Thermal Fuse - located on the blower fan housing. It is a small white plastic looking component with two wires attached. If defective, the dryer will not run at all. If the component is good it should read a short (0 ohms).

2. Internal Bias Thermostat - located on the blower fan housing adjacent to the Thermal Fuse. It has four wires attached to it.

NOTE: All resistance checks should be performed with the component terminal wires disconnected to prevent false readings.

If you have any questions, you can refer to searspartsdirect.com for some helpful exploded view diagrams to assist you. The components I mention are listed under the "Bulkhead" heading as follows:

Item 6 - TCO/Hi-Limit Thermostat replacement kit
Item 15 - Hi-Limit Thermostat sold separately
Item 17 - Heating Element
Item 23 - Thermal Fuse
Item 24 - Internal Bias Thermostat

If you need further assistance, please let me know. I hope this helps you.

If all of the components are reading ok then you need a timer. Touch your 2 leads together. 0 ohms rght. That means you have a complete circuit.If you get the 0 reading then the element must be otay. Bad timer. Take that fancy meater of yours and atttach one of them leads to the timer leg marked RH. Yank the wire off the terminal beore you test. Move the timer around. You should get the famous 0 reading along the way. If you don't then that means you have the bad timer.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

If the heating element read 0 ohms with the wires removed, you have an open heating element, (should be around 10 ohms) replace heating element and you should be ready to rock.

hi If it reads 0 hms yes thats te problem Thanks the appliance doc

If there's no continuity, replace it. The Thermal Cut-Out should read a short if it is good. This could very well be the cause of your heating problem. Make sure you replace the hi-limit thermostat at the same time. Without doing so, one or the other often go bad again. Whirlpool sells the parts as a set and can be found at searpartsdirect.com. I hope this helps you. Let me know if you need further assistance.

PS Double check the heating element too. Disconnect the leads and take a resistance check at the terminals. If good, it will read between 9 and 13 ohms.