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Limit switches monitor operating heat levels. If the equipment gets too hot, the switch opens to shut off the heat source and protect the system from damage.
Specifications
- Part number: 300701
- Brand: Cleveland
- Part type: Hi-limit thermostat
- Height: 1.65 in / 4.19 cm
- Length: 3.45 in / 8.76 cm
- Width: 3.5 in / 8.89 cm
- System: gas, electric or heat pump, as listed
- Stages: heat and cool stages your system uses
- C wire: needed by some models, check yours
From the maker's and parts sellers' listings for this number. Compare them with the label on your old part.
What the Hi-Limit Thermostat Does
A hi-limit thermostat is designed to keep equipment from running at unsafe temperatures. When normal controls fail to regulate heat, this switch acts as a safeguard.
Limit and rollout switches open when they sense too much heat and shut the burners or heating elements off. Because this switch protects against dangerous conditions, it must stay in the safety circuit and work properly.
Part Dimensions and Physical Size
When you check a replacement switch, the physical dimensions help you make sure it fits the mounting bracket and open space.
The Cleveland 300701 switch features the following measurements:
- Height: 1.65 in / 4.19 cm
- Length: 3.45 in / 8.76 cm
- Width: 3.5 in / 8.89 cm
Checking for Signs of Failure
If equipment shuts off early or stops heating entirely, the safety controls may be active. A limit switch that stays open prevents the system from starting a heating cycle.
Before replacing parts, make sure basic issues like restricted airflow are not causing the system to overheat. Once you confirm the switch needs replacement, verify the part number on the old body before removing any wires.
Safe Replacement Steps
Replacing a limit control requires basic electrical safety steps to avoid shock and wiring mistakes.
- Shut off power to the unit at the circuit breaker or power switch, then test to verify no voltage is present.
- Take a photo of every wire connected to the old thermostat before you disconnect anything.
- Carefully remove the mounting hardware and pull the old switch free.
- Position the new switch in place and secure the mounting hardware.
- Move wires one at a time to the same spots on the new part, using your photo as a guide.
- Restore power to the unit and test normal heating operation.
Read your old part
- Turn off power to the unit and locate the existing hi-limit thermostat.
- Wipe away dust or grease to find the manufacturer label or stamped metal casing.
- Check that the part number printed on the old switch matches 300701.
- Compare the physical size with the listed dimensions of 1.65 in / 4.19 cm height, 3.45 in / 8.76 cm length, and 3.5 in / 8.89 cm width to confirm it fits the bracket.
When to call a pro
Hire a licensed HVAC technician for any step you are not sure you can do safely. If your system continues to trip safety limits or requires gas line work, stop and contact a licensed professional.
Questions
Can I bypass this hi-limit thermostat to keep the heat running?
No. Never bypass a limit switch. It is a protective safety device that stops heating when conditions become too hot.
What are the exact dimensions of the Cleveland 300701?
The switch measures 1.65 in / 4.19 cm in height, 3.45 in / 8.76 cm in length, and 3.5 in / 8.89 cm in width.
What should I do before disconnecting the old wires?
Always turn off power at the breaker or switch first. Then take a photo of every wire so you can move them one at a time to the exact same spots on the replacement.
Related part numbers
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- 370736Thermostat Export Fusion, LincolnSame part type
- 18781Thermostat, GaylordSame part type
- 46910700Thermostat Specs and Replacement Guide, APWSame part type
- 11930Thermostat, GaylordSame part type
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