After a Freeze: Well Inspection Checklist
Had freezing temperatures? Even in San Diego County's backcountry, hard freezes can damage well system components. Here's what to check once temperatures rise—and what to do if you find problems.
📋 In This Guide
What Freezes and What Doesn't
Protected from Freezing
- Submersible pump — Deep in the well, below frost line, surrounded by water
- Drop pipe in well — Protected by well casing and water
- Buried pipes — Below frost line (usually 12-18" in San Diego area)
Vulnerable to Freezing
- Pressure tank — Especially in unheated pump houses
- Pressure switch — Small, exposed, can freeze
- Exposed piping — Any pipe above ground or in unheated spaces
- Wellhead fittings — At ground level, exposed to cold
- Hose bibs — Outdoor faucets
- Water heater pipes — In unheated garages
Post-Freeze Inspection Checklist
Step 1: Visual Inspection (Before Running Water)
Check all visible components for:
- ☐ Cracked or split pipes
- ☐ Bulging fittings (indicates ice expanded inside)
- ☐ Frost or ice still on pipes
- ☐ Water stains or wet areas (previous leak)
- ☐ Damaged pressure tank
- ☐ Broken pressure gauge
Step 2: Check the Pressure Gauge
- ☐ Read the current pressure
- ☐ Should be between cut-in and cut-out (typically 30-50 PSI)
- ☐ Zero or very low pressure = possible leak or pump not running
Step 3: Slowly Turn On Water
Important: Don't just blast water through the system. Go slowly:
- Open a faucet partially
- Listen for pump to start
- Watch for leaks appearing
- Check pressure builds normally
- Gradually increase flow
Step 4: Listen for Pump Operation
- ☐ Pump starts when faucet opens
- ☐ No unusual sounds (grinding, clicking)
- ☐ Pump shuts off at correct pressure
- ☐ No rapid cycling (on-off-on-off)
Step 5: Check Each Area
| Location | What to Check |
|---|---|
| Wellhead | Pitless adapter area, above-ground fittings |
| Pressure tank | Tank body, inlet/outlet connections |
| Pump house | All pipes, fittings, valves |
| Outdoor faucets | Hose bibs, irrigation connections |
| Garage/unheated spaces | Water heater connections, exposed pipes |
Common Freeze Damage
Burst Pipes
Signs:
- Water spraying when system pressurizes
- Visible crack or split in pipe
- Pressure won't build (water escaping)
- Pump runs continuously
Action: Shut off pump immediately. Repair or replace damaged section.
Damaged Pressure Tank
Signs:
- Tank bulging or deformed
- Leaking at seams or connections
- Waterlogged (no air cushion remaining)
Action: Replace tank. Damaged bladders can't be repaired.
Frozen Pressure Switch
Signs:
- Pump won't start even though pressure is low
- Ice visible on switch or tubing
- Switch stuck in one position
Action: Allow to thaw. May need replacement if damaged.
Cracked Fittings
Signs:
- Leaking at connections
- Visible cracks in plastic fittings
- Weeping around threaded joints
Action: Replace damaged fittings. Check torque on threaded connections.
Troubleshooting No Water After Freeze
Pipes Still Frozen
- Allow more time to thaw
- Apply gentle heat (hair dryer, heat lamp—NOT open flame)
- Open faucet to relieve pressure as ice melts
- Watch for leaks as thawing occurs
Pump Won't Start
- Check breaker—may have tripped
- Check pressure switch—may be frozen
- Listen at control box for humming (pump trying)
- Thermal overload may need reset after warming
Pump Runs But No Water
- Major leak losing all pressure
- Blockage from ice damage
- Pump damaged from running dry
Pressure Won't Hold
- Leak somewhere in system
- Pressure tank bladder failed
- Check valve damaged
Emergency Steps
If You Find Active Leak
- Turn off pump breaker — Stop pumping water through leak
- Locate shutoff valves — Isolate damaged section if possible
- Drain system — Open lowest faucet to relieve pressure
- Assess damage — Determine repair needs
- Call for help — If beyond DIY repair
If Pump Ran Dry
If frozen pipes blocked water flow and the pump ran without water:
- Pump may have thermal protection that tripped
- Allow motor to cool completely (1-2 hours)
- Ensure water path is clear before restarting
- Monitor closely when restarting
- May need professional evaluation if motor damaged
Prevention for Next Time
Insulation
- Wrap exposed pipes with foam insulation
- Insulate pressure tank in unheated spaces
- Cover wellhead with insulated well cap
Heat Sources
- Heat tape on vulnerable pipes
- Heat lamp in pump house (fire-safe distance)
- Small heater in pump house (thermostat-controlled)
Other Precautions
- Let faucet drip during extreme cold (moving water harder to freeze)
- Drain outdoor faucets and hose bibs before freeze
- Open cabinet doors to let warm air reach pipes
We service all major pump brands including Franklin Electric, Grundfos, Goulds (Xylem), and Sta-Rite (Pentair). Our trucks carry common parts and components for same-day repairs.
Frequently Asked Questions
Can freezing temperatures damage a well pump?
The submersible pump itself, located deep in the well, is protected from freezing because it's below the frost line and surrounded by water that stays above freezing. However, surface components are vulnerable: pressure tanks, pressure switches, above-ground piping, and fittings can all freeze and be damaged. Frozen pipes can burst when they thaw. Additionally, if frozen pipes block water flow and the pump runs dry, the motor can overheat and be damaged even though it wasn't frozen itself.
What should I check after a hard freeze?
Check all visible pipes for cracks, splits, or bulging (indicates ice expanded inside). Inspect the pressure tank for damage or leaks. Check the pressure switch housing. Examine the wellhead and pitless adapter area. Look at water heater connections and any above-ground piping. Then turn on water slowly—listen for pump operation, watch for leaks appearing, and verify normal pressure. Be especially vigilant as pipes thaw—damage often becomes apparent then as cracks open up.
Why do I have no water after a freeze?
Common causes: pipes may still be frozen (apply gentle heat and wait), a burst pipe is causing pressure loss (pump runs but no pressure builds), the pressure switch froze and won't signal pump to start (allow to thaw), or the pump ran dry while pipes were frozen and tripped thermal protection (allow motor to cool, then restart). Check your pressure gauge—zero or very low readings indicate a leak or pump not running. Listen at the control box for pump sounds.
How do I thaw frozen well pipes safely?
Apply gentle heat—never use open flame (fire risk and can damage pipes). Good options: hair dryer, heat lamp, electric heating pad, or heat tape. Start from the faucet end and work toward the frozen section (so melting water can escape). Keep the faucet open to relieve pressure. Be patient—it can take time. Watch carefully for leaks as pipes thaw. Have towels ready to catch water if a crack opens up.
Freeze Damage Repair Services
Southern California Well Service provides emergency freeze damage repair:
- Emergency response — Fast service after freeze events
- Pipe repair/replacement — Fix burst pipes
- Pressure tank replacement — If tank damaged
- System inspection — Find all damage
- Prevention upgrades — Insulation, heat tape installation
Freeze Damage?
We provide fast response for freeze-related well system problems.
Call (760) 440-8520Emergency service | Same-day response | San Diego County
Related: Emergency Repair | Winterization Guide | Tank Replacement
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