Concern 2: The pump runs but turns off prematurely

Gather Important Diagnostic Information

1. How long does the pump run before it turns off?

2. How long does it take for the pump to turn back on?

3. Review the pump’s location-

• Is it in direct sunlight?

• Is it in a well-ventilated area?

• Are there certain times or conditions that make the issue better or worse?

(NOTICE: Answers to these questions may indicate normal operation of the pump: see the section: Inspect the Thermal Safety Switch below. The following diagnostic steps will only be helpful if shut-off is truly abnormal/premature)

Inspect Power Source

1. Visually inspect plug connection and wiring condition for loose connections or damage.

• Not Good: Secure the connection or perform wire repair [electrical shock warning] unplug Misting system before attempting to perform any wire repair on the system. Consult a professional electrician for repairs on power source wiring.

• Good: Proceed to the next step-

2. Is GFCI/breaker tripping when the pump turns off?

• No:  Proceed to step 3 in this section.

• Yes: Proceed to step 4 in this section.

3. Plug the Mistcooling pump into a different, known-good outlet (the usage of a properly rated extension cord is acceptable for diagnostic purposes):

• Pump runtime improves: The issue is in the original power source, not the Mistcooling system. Please consult a professional electrician for diagnosis of the failed power source.

• Pump runtime does not improve: Proceed to Inspect the water source.

4. Reset the breaker and plug in another appliance that draws a current similar to the pump. Does the breaker also trip when that appliance is used?

• Yes: The issue is in the original power source, not the Mistcooling system. Please consult a professional electrician for diagnosis of the failed power source.

• No: Plug the Mistcooling pump into a different, known-good outlet (usage of a properly rated extension cord is acceptable). Does the breaker trip on the known good outlet? 

i. Yes: Replace Pump. Contact a Mistcooling technical support agent through email or by scheduling a call.

ii. No: The issue was in the original power source, not the Mistcooling system. Please consult a professional electrician for diagnosis of the failed power source.

Inspect the Water Source

1. Is the system supplied water by a pressurized source or is it tank fed?

• Tank-fed: Proceed to Tank-fed Water Source Inspection.

• Pressurized source: Proceed to the next step-

2. Visually inspect the water source: Make sure the water is turned fully on. Make sure lines/hoses are free of leaks. Make sure lines/hoses are not kinked, crimped, blocked, twisted, or being squeezed by any objects pressing against them.

• Not Good: address the issue and recheck the operation.

i.  Good: issue resolved

ii. Not Good: Proceed to the next step-

• Good: Proceed to the next step-

3. Inspect water source output: Start by disconnecting the source line from the pump inlet. Is proper flow and pressure present?

• Not Good: work backward down the line by disconnecting the line between the filter to the pump, the filter(s), any line between the filter and source outlet, and any garden hose between the line and source outlet, one at a time to identify the item restricting water flow. Replace as necessary: Find replacement parts here. (If the source outlet itself is restricted, a professional plumber should be contacted. The Mistcooling system is not the issue.)

• Good: Proceed to the next step-

4. Inspect filter for debris and replacement schedule. An overdue/dirty filter may still interfere with pump operation even if some flow is present.

• Not Good: replace the filter. Find filters here.

• Good: Proceed to Inspect the Thermal Safety Switch.

Inspect Thermal Safety Switch*

1. If the pump is hot from operating, the internal thermal safety switch prevents it from turning on until it cools. Make sure the pump has had time to cool off, and recheck the operation.

• Pump runs for a sufficient amount of time (1-3 hours depending on conditions): Issue resolved.

• Run time still does not meet expectations: Contact a Mistcooling technical support agent through email or by scheduling a call (Additional measures such as moving the pump to a well-ventilated, cooler area, adding a mister to mist the pump, an attachable heat-sink, or speed controller may help to prolong runtime.

*Thermal Safety switch

• Oil-less Pumps may generate heat, and motor manufacturers have installed built-in thermal safety switches to improve the longevity of pumps. 

• The thermal safety switch on the pump is turning itself off to cool down. It is not considered a defect.

• Once the heat index is reached, the pump will automatically start back up after the cooling period.

• It is advised to locate the pump at a cool, ventilated, and shaded place.

Tank-fed Water Source Inspection

1. Does the arrangement of the tank and pump still match the original system design? (The feed line from the tank to the pump should have no more than 6 feet between the pump inlet and the surface of the water).

• No: Please make sure the layout fits the original design. Does proper operation resume?

i. Yes: Issue Resolved.

ii. No: Proceed to the next step-

• Yes: Proceed to the next step-

2. Is the tank full and properly ventilated?

• No: Fill the tank and verify proper ventilation. Does proper operation resume?

i. Yes: Issue Resolved.

ii. No: Proceed to the next step-

• Yes: Proceed to the next step-

3. Verify that there is no air caught in the supply line between the tank and the pump inlet: (Attempt to siphon water through the line).

• Water comes out with air bubbles: Allow water to flow until the air is purged, reconnect, then proceed to Inspect the Thermal Safety Switch.

• Water does not flow or flow is restricted: Address the restriction between the tank and of end of the supply hose, reconnect, then proceed to Inspect the Thermal Safety Switch.

• Water flows freely with no air: reconnect, then proceed to Inspect the Thermal Safety Switch.