Gas dryer not heating. A conventional dryer relies on both heat and airflow to dry clothes, and if the airflow is restricted, the dryer may stop heating altogether.
That’s not the only reason why it may stop heating, however. A gas-fueled dryer relies on a number of electrical motors to ignite the natural gas and regulate its flow, and if any of these are defective.
The tumbler and fan won’t spin, but the dryer will still heat up other areas of your home or commercial space.
Gas dryer not heating
why is my dryer not heating? Common reasons for a gas or electrical dryer not to heat up are, tripped circuit breaker, a vent clogged, no gas flow, and perhaps a faulty fuse. Other reasons include the thermal fuse and also the broken element itself.
Defective thermal fuse
If the dryer’s airflow is restricted, the temperature can get high enough to blow a fuse. If so, it cuts power to a circuit that controls the gas valve.
The fuse should be mounted near your dryer, on the exhaust duct just inside of the back panel. You can test your fuse’s continuity with an ohmmeter or multimeter after disconnecting its current wire connections while touching its leads (the two probes) together and then testing between them (with the range “0” or “ohms” function selected).
If your meter gives any reading other than 0 when you do this, your fuse has blown and will need replacement. You’ll have no other option but to install another one in its place.
Gas valve coils and igniter coils
The igniter is like a spark that creates fire. It’s located in your dryer, and it works by creating an electrical current when the heating coils build up with steam.
This conductor can get worn out over time, and sometimes if it turns out, it will glow but not create a spark hot enough to ignite the gas.
If this happens, you’ll want to take care of the problem as soon as possible because other components may also be defective and require repairs or replacements.
To easily determine which part is broken, simply perform an ohm resistance test on either piece just to make sure everything’s working properly before attempting any costly repairs.
Heat and Air Flow
In addition to the dryer machine, the motor spins a fan that circulates air through the heating chamber, in which damp clothes are tumbled.
Warm, moist air is blown out of an exhaust vent when hot air rises from the clothes and hits the baffle (also known as a “ventilator”).
The cycling thermostat turns off the gas supply when there is sufficient cooling of warm moist air, which, in turn, causes the baffle, or ventilator, to become obstructed by lint, causing it to overheat.
Causing the cycling thermostat to turn it back on as soon as there is sufficient cool-down. Whenever this occurs repeatedly as it does with a clogged vent – pants may not dry completely.
Faulty Flame Sensor
Gas dryers have flame sensors that detect the heat emitted by the flame so that the temperature can be controlled.
When they don’t work, the dryer won’t heat. Replacing a dryer’s flame sensor will solve the problem if the igniter and thermal fuse aren’t at fault.
Use a multimeter to test the sensor for continuity at room temperature. If the flame sensor does not have continuity at room temperature, it must be replaced.
Main Control Board fault
Before you attempt a repair on the main control board, make sure you check for a problem with each of the control board’s more commonly known components.
If all of the other components are working properly, then it is likely that the mainboard has been damaged or worn out over time.
Since this particular part cannot be tested without replacing it first, it is necessary to visually inspect it in order to determine if there are signs of burning or melted plastic.
If this turns out to be the case, then you’ll need to purchase a new main control board if you’d like to continue using your Gas dryer.
Defective Timer
Most dryer timers are not defective. Typically, the problem is a clogged lint trap or a loose connection at either the harness connector or the terminal block inside the timer.
In case of a problem with any of these components, check them one by one according to their wiring diagram.In case of a defective timer, replace it.
Cycling Thermostat
The cycling thermostat functions to switch on the heat when the indoor temperature falls below the set point. If it’s defective, the dryer will not heat, but this is rare.
The cycling thermostat is seldom defective, but if you’re having problems with your dryer, start by checking other common things first. Items to check are thermal fuse, heating element, and starting mechanism.
Unless you’ve checked these parts and found them okay, test for continuity of cycling thermostat with a multimeter before replacing it.
Having trouble with incoming power
You may have a problem with incoming power if your dryer isn’t heating up. A dryer needs two legs of 120 volts AC to produce 240 volts.
Some people assume that if their dryer isn’t heating up, then there must be a blown fuse or tripped breaker in the outlet, even though they still have electricity at the outlet.
But, before purchasing a replacement part for your dryer, you should check if any voltage has been lost in those areas.
Gas dryer not heating
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