No hot water? Troubleshoot it like a plumber before you call one.

If you have no hot water, the cause is usually one of a handful of things: a pilot light or thermocouple on a gas unit, a tripped breaker, high limit switch, or dead element on an electric one. Most of these you can check yourself in 10 minutes with a flashlight. Here's the same decision tree we run with callers on the phone, in the order we run it.

We've walked Milford and Novi homeowners through these checks over the phone for years, partly because half the time it saves them a service call. Start by answering one question: is your unit gas or electric? Gas units have a vent pipe on top and a control box near the bottom. Electric units have a metal conduit or cable running into the side and no flame anywhere.

First, one safety rule

If you smell gas anywhere near the unit, stop reading. Don't flip switches, don't relight anything, don't hit the garage door opener on your way out. Leave the house and call your gas utility from outside. Nothing below applies until that's resolved.

Gas water heater: the checklist

• Check the pilot light. Look through the small sight glass near the bottom of the tank. No flame means the pilot is out. Most units have relighting instructions printed on the tank. Follow them exactly, including the part where you hold the button for a full minute.
• Pilot won't stay lit? That's the classic sign of a failed thermocouple, the safety sensor that confirms the flame exists. It's a cheap part, and replacing it is a routine call for us. Repeated relighting won't fix it.
• Pilot is lit but the burner never fires? Check that the dial is set to hot, not vacation. If the setting is right, you're likely into gas valve territory, and that's a diagnosis call, not a DIY job.
• Newer unit with electronic ignition? Look for a blinking status light on the control and count the blinks. The code chart is usually on a sticker behind the access panel. Tell us the code when you call and we'll arrive with the right part.

Electric water heater: the checklist

• Check the breaker first. Water heater breakers are usually a double, 30 amps. If it's tripped, reset it once and give the tank an hour or two to recover.
• Still cold? Try the high limit reset. Kill the breaker, remove the upper access panel on the tank, fold back the insulation, and look for a red button on the thermostat. Press it until it clicks, button everything back up, and restore power.
• One reset is diagnostic, two is a warning. If the breaker or the high limit trips again, stop. Something tripped it for a reason, usually a shorted element or a stuck thermostat, and resetting it repeatedly just stresses the wiring.
• Elements fail in halves. An electric tank has an upper and lower element. When the lower one dies you get a little hot water that fades fast. When the upper one dies you often get none at all. Testing them takes a multimeter and the power off, which for most people is the handoff point.

Lukewarm vs none at all

The distinction matters more than people realize. No hot water at all usually means something binary failed: pilot, breaker, upper element, gas valve. Lukewarm water means the unit is half working, and the suspects change. A dead lower element leaves you with a small slug of hot water that fades fast. A broken dip tube lets incoming cold water mix straight into your hot outlet, so everything comes out tepid. And sometimes nothing is broken at all. The unit is just outmatched.

That last one is a January specialty here. Michigan groundwater runs 40 to 50 degrees, and in deep winter the inlet water at a Milford or Highland home can sit at the bottom of that range. A tank with a sediment layer or a tired element that kept up fine in July suddenly can't close the gap. If your hot water has gotten shorter and cooler every winter, that's not a part failing. That's a unit aging out, and our guide on how long water heaters last in Michigan will help you read the signs.

When to stop and hand it off

• Gas smell. Out of the house, call from outside. Always.
• A second trip of the breaker or high limit. One reset is troubleshooting, two is ignoring a warning.
• Water at the base of the tank. That changes the conversation entirely. Our guide on what to do when a water heater leaks covers the shutdown steps.
• Anything involving the gas valve, wiring, or element replacement. Cheap parts, but the failure modes when they're done wrong aren't cheap.

There's no prize for finishing the repair yourself. The prize is hot water tonight, and knowing the fix won't be the cause of the next call.

Quick answers

Why do I suddenly have no hot water?

Gas unit: usually the pilot light or the thermocouple that keeps it lit. Electric unit: usually a tripped breaker, a tripped high limit switch, or a failed element. Check them in that order.

Why is my water lukewarm but not hot?

The unit is half working: a dead lower element, a broken dip tube mixing cold into the hot line, or a marginal unit exposed by January inlet water near 40 degrees.

When should I stop troubleshooting and call?

Immediately on any gas smell (leave first, call from outside). Otherwise, stop after one reset attempt, or the moment you see water at the base of the tank.

Countryside Plumbing is a licensed master plumber serving Milford, Novi, Farmington Hills, and southeast Michigan since 1979. Water heater repair is what we're known for, and we leave your house clean. Free quotes at 248-705-7543.