Water Heater Tank Repair
London Ontario
No hot water is always an emergency. Hawana HVAC Solutions diagnoses and repairs gas water heater tanks across London Ontario and Southwestern Ontario — $175 diagnostic, same-day service available, 24/7 at zero after-hours surcharge. Most common repairs (thermocouple, T&P valve, anode rod, sediment flush) completed the same visit when parts are available. When repair is not the right answer — tank over 10 years old, body leak, repair cost over 50 percent of replacement — Hawana tells you directly and quotes replacement at the same visit. Written repair vs replace recommendation at every diagnostic. TSSA certified. BBB A+. 138 five-star reviews.
Water Heater Diagnostic — London Ontario
The $175 diagnostic fee includes a full inspection of all components, identification of the failure, a written repair vs replace recommendation based on age, condition, and repair cost relative to replacement, and a written repair quote. If you proceed with the repair, the $175 diagnostic is applied to the repair cost — you do not pay it on top of the repair.
8 Common Water Heater Tank Repairs — Costs & Symptoms
These are the most common failures Hawana diagnoses and repairs on gas water heater tanks in London Ontario. Each includes the typical symptom, cause, and repair cost.
Thermocouple / Thermopile Failure
$150–$250The thermocouple is a safety device that detects the pilot flame and keeps the gas valve open. When it fails, the pilot goes out and will not stay lit when re-lit. Most common repair on tanks under 10 years. Thermocouple replacement is fast — typically completed same visit. Parts and labour $150 to $250 at Hawana. On tanks over 10 years, assess replacement vs repair at the diagnostic visit.
Pilot Assembly Replacement
$175–$300If the pilot assembly itself is corroded or the pilot orifice is partially blocked, the pilot may not light or the flame may be too small to reliably heat the thermocouple. Pilot assembly replacement addresses this. Parts and labour $175 to $300. Typically same-visit repair on tanks in otherwise good condition.
Gas Valve / Thermostat Replacement
$300–$450The gas valve contains the thermostat that controls the main burner. If the pilot is lit but the burner does not fire when the water cools, the gas valve or thermostat is failed. Gas valve replacement is the most expensive common repair at $300 to $450 parts and labour. On a tank over 8–10 years, the repair vs replace calculation is close — Hawana presents both options with published pricing at the diagnostic visit.
Anode Rod Replacement
$150–$250When the anode rod is depleted, hydrogen sulfide-producing bacteria colonize the tank, causing the distinctive rotten egg smell. Anode rod replacement ($150 to $250) on a tank under 10 years old eliminates the smell and protects the tank for several more years. London Ontario municipal water depletes anode rods in 5 to 8 years — proactive replacement extends tank life. Included in Hawana's annual maintenance plan.
Dip Tube Replacement
$150–$250The dip tube carries cold inlet water to the bottom of the tank. If the tube cracks or breaks, cold water enters at the top and mixes with the hot water — the tank feels full but the water is lukewarm. Dip tube replacement ($150 to $250) resolves this on an otherwise healthy tank. Confirm diagnosis at the $175 diagnostic visit — the symptom can also indicate thermostat failure.
T&P Relief Valve Replacement
$150–$250A T&P (temperature and pressure) relief valve that drips or weeps is a safety concern. It may indicate a weakened valve seal (repair: valve replacement $150 to $250) or a genuine over-temperature or over-pressure situation that needs investigation. Never cap or block a T&P valve. Call Hawana for same-day assessment. If the discharge pipe is flowing continuously, shut off the cold water supply to the tank and call immediately.
Sediment Flush
$149–$200Mineral deposits from London Ontario municipal water accumulate at the base of the tank on the gas burner. The noise is steam bursting through the sediment layer. A sediment flush ($149 to $200) removes the buildup and restores quiet, efficient operation — if the tank is under 10 years old and the glass lining is intact. On tanks over 10 years with heavy sediment, replacement is usually more cost-effective than flushing.
Tank Body Leak — Replacement Required
Replace from $2,700A leak from the tank body itself cannot be repaired. The glass lining has failed and the steel tank is corroding through. A leaking tank must be replaced — same-day replacement available. An actively leaking tank can flood a basement and cause thousands in water damage. Call immediately: (647) 550-4220. Bradford White 50-gallon replacement from $2,900 installed.
$175 diagnostic applied to repair: When you call Hawana for a water heater repair, the $175 diagnostic fee is applied toward the repair cost if you proceed with the work on the same visit. If the diagnosis is that replacement is required rather than repair, you receive a written replacement quote at the same visit. You pay only the $175 diagnostic if you decide not to proceed. No hidden fees. 24/7 zero after-hours surcharge. Call (647) 550-4220.
Should You Repair or Replace Your Water Heater?
Hawana's honest rule: repair if both conditions are met — the unit is under 10 years old AND the repair cost is under 50 percent of replacement ($1,350). Replace if either condition fails. Here is what that looks like in practice.
✓ Repair — Both Conditions Must Apply
- Unit is under 10 years old
- Repair cost is under $1,350 (50% of $2,700 replacement)
- Pilot won't stay lit — thermocouple failure ($150–$250)
- Rotten egg smell — anode rod depletion ($150–$250)
- Runs out of hot water fast — dip tube failure ($150–$250)
- T&P valve dripping — valve replacement ($150–$250)
- Rumbling noise — sediment flush ($149–$200)
- No tank body rust, no discoloured water, anode still serviceable
✗ Replace — Either Condition Triggers Replacement
- Unit is over 10 years old (any repair triggers replacement advice)
- Repair cost exceeds $1,350 (50% of $2,700 new tank)
- Tank body is leaking — cannot be repaired
- Gas valve failure on a 10+ year tank ($300–$450 repair cost)
- Rusty or discoloured hot water — glass lining likely compromised
- Second significant repair within 2 years
- Rented unit where buyout + repair exceeds cost of new outright unit
- Visible external rust on tank body near base or fittings
🚨 Never delay a leaking tank: A water heater leaking from the tank body can flood a basement in hours. If you see water pooling at the base of the tank, shut off the cold water supply valve (the pipe entering the top of the tank) and call Hawana immediately. Same-day replacement available. 24/7 zero surcharge. (647) 550-4220
Both quotes at the same visit: At every $175 diagnostic visit, Hawana provides a written repair quote AND a replacement quote so you can compare the actual numbers side by side. You decide with complete information. No pressure either way — Hawana's job is to give you the honest recommendation, not the higher-revenue recommendation. Holt B.'s review below shows exactly what this looks like.
Water Heater Repair — What Happens on the Visit
From call to resolved — most common repairs completed same day. All pricing disclosed before any work begins.
Call Anytime — 24/7
Call (647) 550-4220 any hour. Same rate at 11pm Saturday as 10am Monday. Zero after-hours surcharge — this applies to diagnostics, repairs, and emergency replacements.
Same-Day Dispatch
Hawana dispatches to London Ontario and surrounding areas same day for water heater emergencies. No hot water = priority service.
$175 Diagnostic
Full inspection: burner, pilot assembly, thermocouple, anode rod, T&P valve, tank body, venting. Failure identified, all findings explained.
Written Recommendation
Written repair vs replace recommendation based on age, condition, and cost. Both a repair quote and a replacement quote provided. You choose.
Repair or Replace — Same Visit
If repair: most standard parts carried. Thermocouple, T&P valves, anode rods typically replaced same visit. Gas valve may require 1–2 days to source. If replace: Bradford White 50-gallon often installed same day.
Your Water Heater Repair Specialist — London Ontario
Abdullah Ghzail — Lead HVAC Technician & Founder
Abdullah diagnoses and repairs gas water heater tanks across London Ontario and Southwestern Ontario — $175 diagnostic applied to repair cost, written repair vs replace recommendation at every visit because a 12-year-old tank that needs a $350 gas valve is almost always a replacement, and a 6-year-old tank with a failed thermocouple at $200 is almost always a repair, and the homeowner deserves to know which situation they are in before any work begins. Same-day emergency 24/7 at zero after-hours surcharge. TSSA certified. BBB A+. 138 five-star reviews.
Water Heater Repair Reviews — London Ontario
138 five-star reviews — 7-year-old tank repaired with thermocouple (not replaced), 12-year-old tank honestly recommended for replacement, 9pm T&P valve call with zero surcharge. Read all ↗
"Pilot light kept going out on our 7-year-old Bradford White. Hawana came same day, diagnosed thermocouple failure in under 30 minutes, replaced it on the spot. $175 diagnostic, total repair under $250. The technician also checked the anode rod — getting thin but still serviceable. Recommended replacing it at the next annual visit. Honest, fast, no upsell to replace a tank that still had years of life in it."
"12-year-old tank making loud rumbling, slight rust tinge in the hot water. Hawana came for the $175 diagnostic and gave a written recommendation: anode rod fully depleted, significant sediment, glass lining likely compromised based on the rust tinge — replacement rather than flush was the right call at this age and condition. Quoted $2,900 for a new Bradford White 50-gallon on the spot. We replaced it same week. No pressure, no upsell — a genuine assessment that replacement was the better financial decision."
"Water dripping from the T&P valve on our 6-year-old AO Smith tank. Called Hawana at 9pm — no surcharge for evenings. Technician diagnosed it: valve weakened with age, not a genuine pressure problem. Replaced the T&P valve that evening. $175 diagnostic, valve and labour around $200 on top. Tank fine since. The technician explained what the T&P valve does and why it should never be capped. Education alongside the repair. 24/7 and no surcharge for a 9pm call is the real differentiator."
Water Heater Tank Repair — Southwestern Ontario
Same-day emergency service throughout London Ontario and surrounding communities. Zero after-hours surcharge everywhere.
Water Heater Repair FAQ — London Ontario 2026
Every question London Ontario homeowners ask about water heater repair — no hot water causes, repair costs, pilot light issues, repair vs replace decision, leaks, anode rods, and T&P valves.
No Hot Water in London Ontario?
Call now — $175 diagnostic, same-day available, 24/7 zero after-hours surcharge. Written repair vs replace recommendation at every visit. Replacement from $2,700 if needed. TSSA certified. BBB A+. 138 five-star reviews.
More Water Heating Services
📞 Emergency Water Heater Repair London Ontario
All types: gas tank, tankless, hybrid. 24/7 emergency. Same-day. Zero surcharge.
🐥 New Water Heater Tank Installation
Bradford White from $2,700. Same-day emergency replacement. No rental.
💧 Tankless Water Heater Installation
Navien, Rinnai from $3,500. Endless hot water. No rental.
⚡ Heat Pump Water Heater
From $4,600. Greener Homes $1,000. COP 3.5. No rental.
📋 Annual Maintenance — $149/yr
Anode inspection, sediment flush, T&P test. Prevent breakdowns.
💇 Gas Line Services
TSSA certified. Gas valve replacement, line upgrades, pressure testing.
