How to Bypass Heat Sequencer

How to Bypass Heat Sequencer? 3 Methods with Steps

We know how crucial and important a heat sequencer is. This is very important, especially for a furnace. This controls the heat as long as the furnace runs. But it becomes really problematic when the sequencer stops working.

So, how to bypass heat sequencer?

To bypass the heat sequencer, you can follow 3 different methods. First, you can set the tester to Ohm resistance and troubleshoot it. If not then you also troubleshoot it by applying a low voltage to it. Finally, if you are comfortable with none of these, take professional help.

No, this is just a brief of the solutions. By reading along you’d get to the detailed part that we got here for you.

How Do I Bypass The Heat Sequencer?

Bypassing a heat sequencer might not be the cup of tea of everyone. You must be well aware of the consequences before you go through this.

Below are the three methods of bypassing a furnace heat sequencer-

Method 1: Set The Tester to Ohm Resistance

At first, we need to set the tester to Ohm resistance. See, if there is any continuity across any of the terminals. 

Now, if you see there is no beep or continuity then the sequencer is fine. However, any different than this would indicate the fault of the sequencer.

So, if you notice any beep, you need to replace the sequencer. 

Method 2: Apply Low Voltage

You would find a coil around the heat sequencer. So, you need to apply a low voltage to the coil. Make sure the low voltage supplied matches the requirement of the sequencer.

Like, you can see a rate of voltage mentioned on the heat sequencer. So, keep the voltage the same as that. 

Now, allow for like 3 minutes to test the continuity of it. After that, you need to look at the 4 contracts that are around your sequencer. 

If you do not understand these parts, they are aluminum and greyish in color. So, see if there is any continuity among them.

If you do not find any continuity then replace the heat sequencer.

Method 3: Take Professional Help

If you think you have come up with symptoms, you must not ignore the fact. Because overlooking the symptoms of a bad sequencer could leave deadly consequences.

However, if you think you are nervous about it, that is completely fine. Because it is very normal to have less or no idea about the heat sequencer issues.

In that case, what you do is seek help. Do not just go to a random neighbor and ask for help. Because this needs professional assistance in no time.

So, these are the methods to follow for this. Remember one thing. We recommend not to do anything that is out of your knowledge!

Why Does Heat Sequencer Need a Bypass?

Bypassing a heat sequencer is not a very common phenomenon. But when the heat sequencer to stop working, this is treated as a temporary solution to get your furnace working.

Here are a couple of reasons behind the issue-

Reason 1: The Switch Gets Stuck

The switch of the heat sequencer plays a vital role as you know. As this one’s a vital one, this can impact the operation of the heat sequencer

As for this, the switch of it gets stuck at times. While you turn it on or off, the switch fails to move properly. This happens in the open or close position especially.

As a result, the heat sequencer fails to continue working for this. Following this, there might be a current outbreak as well. And this would be a symptom of a bad heat sequencer.

Moreover, there might be other additional problems too. So, you can not take this one lightly anyway.

Quick Solution

Try to ensure the switch is properly turned on or off. If needed, replace the switch. While replacing the switch, make sure it matches the specs of the previous switch. Otherwise, it’s going to short-circuit or cause an overload of electricity and worsen your situation.

Reason 2: Frequent Use of The Heat Sequencer

The furnace has an approximate limit on running continuously. You must not let the furnace run more than its limit.

During the winter, it will be used frequently all across the season. The conductive metal switch flexes and straightens as a result of this. 

Sequencers are basic switches with a bimetal button and a heating coil. The heating coils get a voltage level. This causes the bimetal switch to heat up. 

This is basically a thermostat that rises as the temperature rises. The bimetal switch flexes as a result of the heat, creating contact throughout the switch. 

Then it continues to transmit power to the components.

Quick Solution

Let the heat sequencer be idle for some time after you use it. And ensure to ground the furnace properly which is important for frequent usage.

Reason 3: Extended Uses

This is kind of similar one to the second one. Because this is also related to somewhat like over-usage. You know we use furnaces only in the winter season.

We do not any way even look at it in the summertime. Thus, the heat sequencer sits idle in the summer. However, there are some people who try to do something different.

Perhaps, they enjoy the summer with an air conditioner along with the furnace too. Because this might seem cozy to them.

However, there is a side effect of using a furnace in the summer. That is, it can damage the heat sequencer. 

As it is already hot in summer, the heat sequencer goes through even more heat. Thus, the sequencer needs to take more pressure working for the furnace.

And therefore, the heat sequencer might have issues eventually. It’d take longer to heat the house than the general time to heat the house.

Quick Solution

Do not use the furnace in summer without any valid reason. You must stop using the furnace in summer continually if you do so.

Reason 4: No Operation for A Long Time

You know summertime is a break for your furnace. But it might still need an operation at times. 

Because the internal parts of the furnace might get damaged by being idle for so long. And the heat sequencer is one of the most vulnerable ones in this.

Remember that it is a very general thing for a device. You must not keep a device turned off for so long. Even if it is in a seasonal break, consider turning it on at times.

Quick Solution

Turn on your furnace at least once or twice in the summertime. But you do not have to keep it turned for a long time though.

So, these are the main reasons for the heat sequencer problem.

Frequently Asked Questions (FAQs)

Where do I locate the heat sequencer?

The heat sequencer would be just in between the thermostat and the heating elements. You may notice a square outer housing around it. The color of a heat sequencer is generally either black, greyish, or blueish. This also looks like a magnetized motor of a machine.

What happens if the heat sequencer is faulty?

A heat sequencer is one of the main and basic parts of a furnace. If it turns bad or is faulty, the furnace would not continue working properly. Because the circuit might blow out anytime. Moreover, there would be overheating too. You need to fix it as soon as possible.

Is a heat sequencer used only in a furnace?

No, a heat sequencer is also commonly used in heat pumps along with furnaces. A heat sequencer is basically used in any heating device. A heat sequencer always keeps one portion of the machine shut so that it does not overheat. It also prevents the internal parts from damaging.

Final Words

Now you know how to bypass the heat sequencer! You also got a number of useful info about it in our article here.

But one more thing to go. Electrical or mechanical stuff might have issues at times. However, you must make sure not to play with it. That is, you need to handle this with proper knowledge!

Wishing a good luck!

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