Lennox Y0349 Thermostat Teardown

撰写者： teardown-er (和另外2个贡献者)

发布于： February 20, 2021

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Lennox Y0349 Thermostat Teardown

撰写者： teardown-er (和另外2个贡献者)

发布于： February 20, 2021

评论： 0
收藏 0
浏览量 2.3千

拆解

简介

While this teardown is meant for the Lennox Y0349, the steps remain similar for other Lennox thermostats such as the Y2081. The steps are simple, and could be completed by anyone with a few basic tools. However, a long flathead screwdriver will make the job much easier.

你所需要的

这个拆解是不是维修指南。要维修你的的Lennox Y0349 Thermostat，请使用我们的维修手册。

步骤 1 Thermostat

Lennox Y0349 Thermostat Teardown, Thermostat: 步骤 1 中的图像 1，1

Here is the Lennox Y0349.

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步骤 2 Remove the Thermostat from the Wall

Lennox Y0349 Thermostat Teardown, Remove the Thermostat from the Wall: 步骤 2 中的图像 1，1

Pushing in at the bottom of the thermostat, pull down and remove the thermostat from the wall. Note: the circuit breaker for the HVAC system MUST be off. Use caution when handling electrical wires.

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步骤 3 Remove the Back Plate

Lennox Y0349 Thermostat Teardown, Remove the Back Plate: 步骤 3 中的图像 1，2

Lennox Y0349 Thermostat Teardown, Remove the Back Plate: 步骤 3 中的图像 2，2

Locate the plastic tabs, and using a flat headed screwdriver, push them inward. This may take some force, but the plastic should give fairly easily.

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步骤 4 Removing the Board and Display

Lennox Y0349 Thermostat Teardown, Removing the Board and Display: 步骤 4 中的图像 1，3

Lennox Y0349 Thermostat Teardown, Removing the Board and Display: 步骤 4 中的图像 2，3

Lennox Y0349 Thermostat Teardown, Removing the Board and Display: 步骤 4 中的图像 3，3

The board is exposed! Now simply push back the plastic tabs connecting the board and disconnect the cables

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步骤 5 Board and LCD - Closer Look

Lennox Y0349 Thermostat Teardown, Board and LCD - Closer Look: 步骤 5 中的图像 1，3

Lennox Y0349 Thermostat Teardown, Board and LCD - Closer Look: 步骤 5 中的图像 2，3

Lennox Y0349 Thermostat Teardown, Board and LCD - Closer Look: 步骤 5 中的图像 3，3

Now that the board is removed, we see 8 3 volt relays, the temperature and humidity sensor (on it's own board) a small battery, and the microprocessor.
The screen has 3 cables (the wide one is for the LCD, the skinny one if for the digitizer, and the simple, red and black one is for the backlighting.

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