I have a whirlpool lgr7620lg0 gas dryer and its takes many times to dry the clothes i've replaced the high limit switch thermal swith the flame senor basic all the switches in the back the only thing i have not replaced is the igniter what do you think.

If it works to begin with and fails afterwards then that can only be them solenoids mounted on the gas assembly. Here is my home video which shows how to check and replace:

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it can be the ignitor as described above,or the gas valve coils on the gas valve getting weak or gone completely,or even the high limit thermostat on the burner housing open and also the flame sensor next to the high limit but these rarely go bad,the thermal fuse can be bad but on these if this goes out the whole unit quits and it sounds as though it still turns just no heat

Sounds like heating element may be grounding out.

Hi.

If dryer is electric check for lint obstructions, check ventilation, test thermal fuse, thermistor, cycling thermostat and high limit, element and fan.

If dryer is gas check for lint obstructions, check ventilation, test thermal fuse, thermistor, cycling thermostat and high limit, igniter, coils, burner, flame sensor and fan.

Hello.

If your Maytag dryer has mysteriously stopped producingheat, a blown thermal fuse may be the cause of your problem. In Whirlpool dryers,thermal fuses are safety switches that are designed to disrupt the flow ofelectricity to your dryer's heating mechanisms once the dryer reaches apredetermined maximum temperature, usually somewhere around 180 degrees F.Thankfully, troubleshooting the thermal fuse in a Maytag dryer is easierthan it sounds. Instructions And Things You'll Need

• Screwdriver
• Towel
• Electrical tape
• Replacement thermal fuse, if necessary

1 Clean out thelint screen in your Maytag clothes dryer. Lint buildup can cause your dryerto overheat, triggering the thermal fuse to disrupt power to your dryer'sheating mechanisms. Take the lint screen out of your Whirlpool dryer and washit in warm water. Dry the screen thoroughly before replacing it.
2 Look behindthe dryer to check its flexible exhaust hose for kinks or obstructions.Disconnect the exhaust hose from the back of your dryer and clean out any lintthat has built up.
3 Go outside andcheck your Maytag dryer's exhaust vent for obstructions. Lint buildup, birdnests or other obstructions in the outside exhaust vent can trigger yourdryer's thermal fuse.
4 Disconnectyour dryer from its power source before attempting to access its thermal fuse.
5 Access the thermal fuse in your Maytag dryer byremoving the back panel. Remove the screws that hold the back panel in placeand it should easily come free.
6 Look betweenthe dryer's blower housing and exhaust to locate its thermal fuse. The thermalfuse in a Whirlpool dryer looks like a white plastic strip that has two wiresconnected to it.
7 Bypass the thermal fuse in your Maytag dryer whileyou perform a quick diagnostic test. Use electrical tape to tape together thetwo wires connected to the thermal fuse. Reassemble your dryer and plug it backin. Set the dryer to a timed heated drying cycle and press "Start."If the dryer produces heat with its thermal fuse bypassed, it means the thermalfuse needs to be replaced.
8 Replace a blown thermal fuse in your Maytag dryer.Disconnect the power and remove the back panel. Remove the electrical tape thatyou used to perform the diagnostic test and disconnect the wires from thethermal fuse. Remove the screws that secure the thermal fuse to the dryer anddiscard the blown fuse. Attach the replacement thermal fuse by replacing andtightening the screws. Attach the wires to the new thermal fuse.
Thanks for using fixya.

You might want to replace the thermacouplar. Sometimes when they are going out , all will appear to be alright but as you stated it takes a long time for the flame to come back on. This sounds to me like the thermacouplar is going out.

There is a flame sensor on the burner, it is probably the problem. It can get dirty(wipe the windo on it). Also with the drum out you have short circuted the air flow. Clean the inside as lint burns to well and is hazardous. The dryer may be equiped with a one time high limit switch, protection in case of over heating, it may need to be replaced. The thermo disc (thermostat-s coul be bad) Check all components with a multimeter. Ust the wireing diagram usually inside the control head, as a guide. GoodLuck. If this was helpfull, Please leave Positive Feedback. Thanks, SnugglePants

This repair will most likely be much cheaper than buying a replacement, unless you just want to make a jump to gas. First, check the venting for the dryer. Clogged venting can cause prolonged drying times. It could also be caused by a blown thermal fuse, bad heating element or high limit thermostat. If the venting is clear all the way to where it exhausts to the outside, then I would suspect bad thermal fuse or high limit thermostat. They can be tested using a multimeter or ohmmeter. It is best to replace both the thermal fuse and the high limit thermostat at the same time and they often come from the parts supplier as a set. I'll attach a photo of a fuse/thermostat for reference. Really sorry for your trouble and I hope this helped some. Best wishes.

since you know your stuff and our exhaust is clear correct,,,change your gas vavle coils ..if weak they will shut unit down in a couple of mintues..