The quick verdict
A Criterion dishwasher that does not heat washes and rinses cold, which shows up as poor cleaning and wet dishes rather than as an obvious fault. The usual causes are the element, its sensor, or scale insulating one from the other. Everything here assumes the machine is behaving now rather than intermittently.
Symptoms, and the ones that mean something else
- Dishes come out cold and wet at the end — No heat means no drying, because drying depends on the load holding heat. If the answer is clear, stop here and act on it.
- Detergent tablets found undissolved at the end — A cold wash cannot dissolve a tablet, and finding one intact is proof rather than a hint. Time it roughly, as the pattern matters more than the exact interval.
- The door stays cold through the main wash — The simplest confirmation available that the water is not being heated. Give it a moment rather than glancing; the thing you are looking for is not always obvious.
- The cycle finishes sooner than it used to — Heating takes time; a machine that skips it finishes early without saying why. Keep an eye on whether it is getting worse, because the rate of change is itself evidence.
The order of suspicion
- A failed heating element — First because it works in water on every cycle and fails open without any other warning. Time it roughly, as the pattern matters more than the exact interval.
- A temperature sensor reading wrongly — A sensor reporting warm water produces a machine that never heats and never reports a fault. If this is the cause, the evidence for it is usually visible rather than inferred.
- Programme choice — Eco and quick programmes run cooler by design, and a changed habit explains a real share of these complaints.
- No rinse aid, so the load will not dry — Last, and worth stating: poor drying with hot dishes is a rinse-aid problem rather than a heating one. Treat the ordering as a route through the possibilities rather than as a prediction.
The order that saves time
- Feel the door glass or panel during the main wash — Warm means it is heating. Cold on a hot programme is your answer without opening anything. The position matters more than the name: work the order rather than the one you have heard of.
- Look for undissolved detergent at the end — It is the clearest evidence of a cold wash and it costs nothing to check. If you can only do one check, make it this one.
- Confirm which programme is selected — Eco cycles run cooler and longer deliberately, which rules out a fault entirely in some cases. The position matters more than the name: work the order rather than the one you have heard of.
What an owner can safely check
- Run the hottest programme and check the door after some minutes — Use an empty machine and feel the door rather than opening it mid-cycle. This is the cheapest information available on the machine.
About 30 min
- Run a descaling cycle — In a hard-water area this is worth doing regardless, and it can restore an element that is heating through scale. Do it with the machine empty rather than mid-load.
Tools: descalerAbout 25 min
- Top up the rinse aid and set the dose — If the complaint is wet rather than dirty dishes, this is the cheapest thing to eliminate first. If the answer is clear, stop here and act on it.
Tools: rinse aidAbout 10 min
- Go no further than this without test gear — That is the boundary between a homeowner check and a service call, and it is not a soft one.
Before you open anything
Safety
Power down at the breaker first, and treat the cabinet as live until you have. Give it a moment after switching off; charge lingers where you would not expect it. Do not run a cycle to test something while the machine is open or pulled out of its housing. If a guard or switch is in your way, that is the point at which the job stops being yours.
The handover point
Here is the split as a technician would put it. If the cure is chemistry or a setting, do it; anything behind the tub is a service call. That line is about tools and access rather than about confidence. Call promptly if water has reached the floor more than once, since a leak that returns has usually found a path you cannot see.
Nearby pages
What is deliberately not here
Treat this as the orientation page for a Criterion dishwasher rather than as a service sheet for yours.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
